Chapter Words Relating to the Intellectual Faculties of Index by Roget's Thesaurus

(Phrases). A word to the wise; verbum sapienti.

Intelligence, comprehension, understanding, learning 539.

(Verbs). To be intelligible, etc.

To render intelligible, etc., to simplify, to throw light upon.

(Phrases). Cela saute aux yeux; he who runs may read; to stand to reason; to speak for itself.

To understand, comprehend, take, take in, catch, catch on to, twig, get the hang of, grasp, collect; master, tumble to.

(Phrases). To come to an understanding; to see with half an eye.

(Adjectives). Intelligible, clear, lucid, understandable, explicit, expressive, significant, express, distinct, precise, definite, well-defined, perspicuous, transpicuous, striking, plain, obvious, manifest, palpable, glaring, transparent, above-board, unambiguous, unmistakable, legible, open, positive, unconfused, unequivocal, pronounced, graphic, readable.

(Phrases). Clear as day; clear as noonday; not to be mistaken; plain as a pikestaff; in plain English.

516. Unintelligibility (Substantives), incomprehensibility, inconceivability, darkness 421, obscurity, confusion, perplexity, imbroglio, indistinctness, mistiness, indefiniteness, vagueness, ambiguity, looseness, uncertainty, mysteriousness 526, paradox, inexplicability, incommunicability, spinosity.

Jargon, gibberish, rigmarole, rodomontade, etc. 497.

(Phrases). Obscurum per obscurius; lucus a non lucendo.

High Dutch, Greek, Hebrew, etc.

(Verbs). To be unintelligible, etc., to pass comprehension.

To render unintelligible, etc., to perplex, confuse, confound, bewilder, darken, moither.

Not to understand, etc., to lose, miss, etc., to lose the clue.

(Phrases). Not to know what to make of; not to be able to make either head or tail of; to play at cross purposes; to beat about the bush.

(Adjectives). Unintelligible, incognisable, inapprehensible, incomprehensible, inconceivable, unimaginable, unknowable, above or past or beyond comprehension, inexplicable, illegible, undecipherable, inscrutable, beyond one's depth, paradoxical, insoluble, impenetrable.

Obscure, dark, confused, indistinct, indefinite, misty, nebulous, indefinite, undefined, ill-defined, perplexed, loose, vague, ambiguous, disconnected, incoherent, unaccountable, enigmatical, hieroglyphic, mysterious, mystic, mystical, intricate, at cross purposes.

Hidden, recondite, abstruse, crabbed, transcendental, farfetched, in nubibus, searchless, unconceived, unimagined.

(Phrases). Greek to one; without rhyme or reason; obscurum per obscurius.

517. Having a double sense.

Equivocalness (Substantives), double meaning, quibble, equivoque, equivocation, double-entendre, amphibology, prevarication, tergiversation, slip of the tongue, lapsus linguœ, a pun, play on words.