Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

intellect &c 450; shadowness†, silliness, foolishness &c adj.; imbecility, incapacity, vacancy of mind, poverty of intellect, weakness of intellect, clouded perception, poor head, apartments to let; stupidity, stolidity; hebetude†, dull understanding, meanest capacity, shortsightedness; incompetence &c (unskillfulness) 699. one's weak side, not one's strong point; bias &c 481; infatuation &c (insanity) 503. simplicity, puerility, babyhood; dotage, anility†, second childishness, fatuity; idiocy, idiotism†; driveling. folly, frivolity, irrationality, trifling, ineptitude, nugacity†, inconsistency, lip wisdom, conceit; sophistry &c 477; giddiness &c (inattention) 458; eccentricity &c 503; extravagance &c (absurdity) 497; rashness &c 863. act of folly &c 699. V. to be an imbecile &c adj.; have no brains, have no sense &c 498. trifle, drivel, radoter†, dote; ramble &c (madness) 503; play the fool, play the monkey, monkey around, fool around; take leave of one's senses (insanity) 503; not see an inch beyond one's nose; stultify oneself &c 699; talk nonsense &c 497. Adj. unintelligent [Applied to persons], unintellectual, unreasoning; mindless, witless, reasoningless†, brainless; halfbaked; having no head &c 498; not bright &c 498; inapprehensible†. weak headed, addle headed, puzzle headed, blunder headed, muddle headed, muddy headed, pig headed, beetle headed, buffle headed†, chuckle headed, mutton headed, maggoty headed, grossheaded†; beef headed, fat witted, fat-headed. weak-minded, feeble-minded; dull minded, shallow minded, lack- brained; rattle-brained, rattle headed; half witted, lean witted, short witted, dull witted, blunt-witted, shallow-pated†, clod-pated†, addle- pated†, addle-brained†; dim-sighted, short-sighted; thick-skulled; weak in the upper story. shallow, borne, weak, wanting, soft, sappy, spoony; dull, dull as a beetle; stupid, heavy, insulse†, obtuse, blunt, stolid, doltish; asinine; inapt &c 699; prosaic &c 843; hebetudinous†. childish, child-like; infantine†, infantile, babyish, babish†; puerile, anile; simple &c (credulous) 486; old-womanish. fatuous, idiotic, imbecile, driveling; blatant, babbling; vacant; sottish; bewildered &c 475. blockish†, unteachable Boeotian, Boeotic; bovine; ungifted, undiscerning†, unenlightened, unwise, unphilosophical†; apish; simious†. foolish, silly, senseless, irrational, insensate, nonsensical, inept; maudlin. narrow-minded &c 481; bigoted &c (obstinate) 606; giddy &c (thoughtless) 458; rash &c 863; eccentric &c (crazed) 503. [Applied to actions] foolish, unwise, injudicious, improper, unreasonable, without reason, ridiculous, absurd, idiotic, silly, stupid, asinine; ill-imagined, ill-advised, ill-judged, ill-devised; mal entendu [Fr.]; inconsistent, irrational, unphilosophical†; extravagant &c (nonsensical) 497; sleeveless, idle; pointless, useless &c 645; inexpedient &c 647; frivolous &c (trivial) 643. Phr. Davus sum non [Lat.] [Oedipus]; a fool's bolt is soon shot [Henry V.] clitellae bovi sunt impositae [Lat.] [Cicero]; fools rush in where angels fear to tread [Pope]; il n' a ni bouche ni eperon [Fr.]; the bookful blockhead, ignorantly read [Pope]; to varnish nonsense with the charms of sound [Churchill].