Foible

a.	1.	Weak; feeble.
n.	1.	A moral weakness; a failing; a weak point; a frailty. A disposition radically noble and generous, clouded and overshadowed by superficial foibles. - De Quincey.
	2.	The half of a sword blade or foil blade nearest the point; - opposed to forte.

Noun	1.	foible - a behavioral attribute that is distinctive and peculiar to an individual Synonyms: idiosyncrasy, mannerism
	2.	foible - the weaker part of a sword's blade from the forte to the tip

bad habit, besetting sin, blemish, bug, catch, crack, crotchet, defect, defection, deficiency, drawback, eccentricity, failure, fault, faute, flaw, hang-up, hole, idiosyncrasy, imperfection, inadequacy, infirmity, kink, little problem, moral flaw, peculiarity, preoccupation, problem, quirk, rift, snag, something missing, taint, vice, vulnerable place, weak link, weak point, weak side