Mawson, C.O.S., ed. (18701938). Rogets International Thesaurus. 1922.
Class IV. Words Relating to the Intellectual Faculties Division (I) Formation of Ideas
Section V. Results of Reasoning
499. Imbecility. Folly.
NOUN: IMBECILITY; want of intelligence [See Intelligence. Wisdom], want of intellect [See Intellect]; shallowness, unwisdom, silliness, foolishness &c. adj.; morosis, incapacity, vacancy of mind, poverty of intellect, clouded perception, poor head; apartments -, rooms -, space- to let [ all slang]; nobody home [ slang]; stupidity, insulsity [ rare], stolidity; hebetude, dull understanding, meanest capacity, shortsightedness; incompetence ( unskillfulness) [See Unskillfulness].
BIAS [See Misjudgment]; infatuation ( insanity) [See Insanity]; ones weak side.
SIMPLICITY, puerility, babyhood; senility, dotage, anility, second childishness, fatuousness, fatuity; idiocy, idiotism, jobbernowlism [ colloq., Eng.], driveling, driveling idiocy; senile dementia.
FOLLY, frivolity, irrationality, trifling, ineptitude, nugacity, futility, inconsistency, lip wisdom, conceit; sophistry [See Intuition. Sophistry]; giddiness ( inattention) [See Inattention]; eccentricity [See Insanity]; extravagance ( absurdity) [See Absurdity]; rashness [See Rashness].
act of folly [See Unskillfulness].
VERB: BE IMBECILE &c. adj.; have no -brains, - sense [See Intelligence. Wisdom]; have a screw loose [ colloq.].
TRIFLE, drivel, radoter [ F.], dote; ramble ( madness) [See Insanity]; play the -fool, - monkey; take leave of ones senses; not see an inch beyond ones nose; stultify oneself [See Unskillfulness]; talk nonsense [See Absurdity].
ADJECTIVE: [A PPLIED TO PERSONS] UNINTELLIGENT, unintellectual, unreasoning; mindless, witless, reasonless, brainless; half-baked [ colloq.], having no head [See Intelligence. Wisdom]; not bright [See Intelligence. Wisdom]; inapprehensive, thick [ colloq.].
blockish, unteachable; Botian, Botic; bovine; ungifted, undiscerning, unenlightened, unwise, unphilosophical; apish, simious, simian.
weak-, addle-, puzzle-, blunder-, muddle- [ colloq.], jolter-, jolt-, chowder-, pig-, beetle-, buffle- [ obs.], chuckle-, mutton-, gross- headed; maggot-pated [ obs.], beef-headed, beef-witted, fat-headed, fat-witted.
WEAK-MINDED, feeble-minded; dull-, shallow-, lack- brained; rattle- brained, -headed; sap-head [ colloq.], muddy- brained, addle-brained; half-, lean-, short-, shallow-, dull-, blunt- witted; shallow-, clod-, addle- pated; dim-, short- sighted; thick-skulled; thick-headed; weak in the upper story [ colloq.], inapprehensible, nutty [ slang], batty [ slang], balmy in the crumpet [ slang], loony or luny [ slang].
SHALLOW, borné [ F.], weak, wanting, soft [ colloq.], sappy, spoony or spooney [ slang]; dull, - as a beetle.
STUPID, heavy, insulse [ rare], obtuse, blunt, stolid, doltish; asinine; inapt [See Unskillfulness]; prosaic [See Dullness]; hebetudinous, hebetate, hebete [ rare].
CHILDISH, childlike; infantine, infantile, babyish, babish; puerile, senile, anile; simple( credulous) [See Credulity]; old-womanish.
IMBECILE, fatuous, idiotic, driveling; blatant, babbling; vacant; sottish; bewildered [See Uncertainty].
FOOLISH, silly, senseless, irrational, insensate, nonsensical, inept; maudlin.
NARROW-MINDED [See Misjudgment]; bigoted ( obstinate) [See Obstinacy]; giddy ( thoughtless) [See Inattention]; rash [See Rashness]; eccentric ( crazed) [See Insanity].
[A PPLIED TO ACTIONS] FOOLISH, unwise, injudicious, improper, unreasonable, without reason, ridiculous, silly, stupid, asinine; ill-imagined, ill-advised, ill-judged, ill-devised; mal entendu [ F.]; inconsistent, irrational, unphilosophical; extravagant ( nonsensical) [See Absurdity]; sleeveless [ obs.], idle; useless [See Inutility]; inexpedient [See Inexpedience]; frivolous ( trivial) [See Unimportance].
QUOTATIONS: Davus sum non Ædipus.
A fools bolt is soon shot.
Henry V Clitellæ bovi sunt imposit.Cicero
Fools rush in where angels fear to tread.Pope
Il na ni bouche ni éperon.
The bookful blockhead, ignorantly read.Pope
To varnish nonsense with the charms of sound.Churchill
And duller shouldst thou be than the fat weed That roots itself in ease on Lethe wharf.
Hamlet Men are so necessarily foolish that not to be a fool is merely a varied freak of folly.Pascal