To publicly recommend, support, or argue in favour of a cause, policy, or position — from Latin advocare (ad-, to + vocare, to call — literally to call someone to one’s aid; in Roman law, an advocatus was the person called to speak in support of another’s legal case); the committed-and-persuasive purpose verb; an author who advocates is not neutral — they have a position and are arguing for it, seeking to persuade the reader.

Advocate is the committed-persuasion purpose verb — the one that flags an author who is not merely explaining or informing but pushing for a specific outcome. The Latin root (advocare — to call to one’s aid) captures the legal origin: an advocate in court calls every available argument to the service of a predetermined conclusion. In RC passages, the advocating author states a position, marshals evidence and reasoning in its support, addresses counterarguments to dismiss them, and frames the conclusion in terms of what should be done or believed. Unlike elucidate (neutral explanation — the author does not have a position to push) and substantiate (evidence-provision — the author is proving a specific claim rather than arguing a general case), advocate describes the full committed-persuasion purpose: the author wants you to agree and, often, to act.

“Throughout the report, the commission advocates a fundamental restructuring of the planning system — arguing that the current framework, designed in an era of low housing demand and stable demographics, is structurally incapable of delivering the volume and variety of housing the country requires, and that incremental reform within the existing framework will not suffice.”

To make something clearer; to explain or shed light on — from Latin elucidare (e-, out + lux/lucis, light — to bring out into the light, to illuminate); the clarifying-and-informative purpose verb; an author who elucidates aims at comprehension: the reader should understand better after reading, not necessarily agree with anything in particular; the purpose is understanding, not persuasion.

Elucidate is the neutral-clarifying purpose verb — the one that describes an author whose goal is the reader’s understanding rather than the reader’s agreement. The Latin root (elucidare — to bring out into the light) is the etymology and the mnemonic: elucidating brings something that was obscure or unclear into the light of comprehension. Unlike advocate (the author argues for a position) and substantiate (the author proves a specific claim), elucidate describes a purpose that is genuinely informative: the author is explaining how something works, what something means, or why something happened, without necessarily having a stake in the reader’s response. In RC questions, elucidate is the correct answer when the passage is explanatory and clarifying in character — not arguing, not proving, not spreading, but illuminating.

“The first three chapters of the study elucidate the historical context in which the regulatory framework developed — tracing the legislative decisions of the 1970s and 1980s that created the current structure, explaining the assumptions about market behaviour on which those decisions were based, and identifying the ways in which subsequent changes in the industry have rendered those assumptions increasingly unreliable.”

To provide evidence or facts to support or prove a claim; to give substance and credibility to an assertion — from Latin substantiare (to give substance to — from substantia, substance, essence, that which stands under, from sub- + stare, to stand); the evidence-providing purpose verb; an author who substantiates is not just asserting or explaining but proving: they are moving a claim from the status of assertion to the status of supported conclusion.

Substantiate is the evidence-providing purpose verb — the one that describes an author whose goal in a specific section or passage is to move a claim from assertion to demonstrated conclusion by providing supporting evidence. The Latin root (substantiare — to give substance to, from substantia, that which stands under) is the image: substantiation gives an assertion the solid foundation of evidence to stand on. Unlike advocate (the author argues for a general position — substantiation is typically a component of advocacy, not the whole of it) and elucidate (the author explains without taking a position), substantiate describes a specific evidential purpose: the author already has a claim and the purpose of the current passage or section is to back that claim with proof. In RC purpose questions, substantiate is most often correct for sub-questions about what a specific paragraph or section is doing within a larger argument.

“The central chapters of the report substantiate the opening contention that regulatory capture has systematically distorted the policy outcomes in this sector — presenting data on the revolving door between the regulator and the regulated industry, analysing the pattern of enforcement decisions over a thirty-year period, and examining three case studies in which the regulator’s decisions demonstrably benefited industry incumbents at the expense of market competition.”

To spread or promote ideas, beliefs, or information to a wide audience — from Latin propagare (to extend by layering, to reproduce by shoots — from propago, a shoot or layer used for plant propagation); in figurative use, the spreading of ideas as organic growth: ideas propagate like plants sending out shoots; often carries a slightly negative or ideologically loaded connotation — propaganda shares this root; what is propagated is frequently a belief, doctrine, or view being spread beyond its original context.

Propagate is the wide-spreading purpose verb — the one that describes dissemination of ideas across a wide audience, with a botanical image of organic spread. The Latin root (propagare — to extend by layering, from propago, a plant shoot) gives the word its characteristic quality: ideas propagate the way plants send out shoots, extending their reach through a kind of natural growth. In figurative use, propagate often describes the spread of beliefs, doctrines, and viewpoints — and through its shared root with propaganda, it can carry a slight connotation of uncritical or ideological spreading. Unlike promulgate (formal and official — a law or doctrine formally declared by an authority), propagate describes informal, organic spread through networks, publications, and communities.

“The movement’s primary vehicle for propagating its economic philosophy was not political lobbying but a network of think-tanks, academic fellowships, and subsidised publications that introduced the ideas to successive generations of journalists, policy advisers, and politicians — ensuring that when the political conditions finally favoured implementation, a trained cohort of advocates was ready to translate the philosophy into concrete policy proposals.”

To make known by official or public announcement; to put a law, regulation, or doctrine formally into effect — from Latin promulgare (to make public, to publish — etymology debated; possibly from pro-, forth + mulgare, to bring forth); the most formal and official of the five: what is promulgated is declared by an authority — a government, a court, an institution, a church — and carries the weight of that authority; laws, regulations, and official doctrines are promulgated.

Promulgate is the formal-official-declaration purpose verb — the most institutionally weighted of the five, describing the authoritative announcement by which laws, regulations, and official doctrines are put into public effect. The Latin root (promulgare — to make public, possibly to bring forth) captures the quality of formal publication: what is promulgated is not merely spread or argued for but officially declared by an entity with the authority to make it binding or official. Unlike propagate (which describes informal organic spread — no authority is required) and advocate (which describes arguing for a position — no declaration is made), promulgate is reserved for formal institutional contexts: governments promulgate laws; courts promulgate decisions; churches promulgate doctrines; regulatory bodies promulgate guidelines. The weight of institutional authority is always present.

“Following the extended consultation period, the commission promulgated a revised set of conduct standards that would apply to all registered practitioners from the following financial year — the standards representing the most significant reform of the professional framework since the sector’s establishment and incorporating the recommendations of three independent reviews conducted over the preceding decade.”