1. (p. pr. & vb. n.) of Fail.

2. (n.) A failing short; a becoming deficient; failure; deficiency; imperfection; weakness; lapse; fault; infirmity; as, a mental failing.

3. (n.) The act of becoming insolvent of bankrupt.

abortive arrested bad habit besetting sin blemish blind spot bootless bug cachectic callow catch comedown coming apart crack cracking crumbling debasement debilitated decadence decadency decadent declension declination decline declining defect defection defective deficiency deficient deformation degeneracy degenerate degenerateness degeneration degradation demotion depravation depravedness depreciation derogation descent deteriorating deterioration devolution disintegrating downtrend downturn downward mobility downward trend drained draining drawback drooping drop dwindling dying ebb ebbing effete effeteness embryonic enervated exhausted fading failed failure failure of nerve fall falling falling-off fault faute feeble flagging flaw foible found wanting fragmenting frail frailty fruitless futile going to pieces healthless hole hypoplastic immature imperfect imperfection in arrear in arrears in default in default of in poor health in short supply inadequacy inadequate incompetent incomplete ineffective ineffectual inefficacious infant infirm infirmity insufficient invalid involution kink lacking lame languishing lapse little problem loss of tone manque marcescent miscarried miscarrying missing moral flaw moribund needing not enough of no effect pale part partial patchy peaked peaky pining problem reduced reduced in health regression regressive retrocession retrogradation retrograde retrogression retrogressive rift run-down sans scant scanty scarce scrappy short shortcoming shriveling shy sickly sinking sketchy sliding slippage slipping slump slumping snag something missing stickit stillborn subsiding successless tabetic taint too little underdeveloped undeveloped unequal to unfortunate unhealthy unqualified unsatisfactory unsatisfying unsound unsuccessful unsufficing useless valetudinarian valetudinary vice vulnerable place wane waning wanting wasting weak link weak point weak side weakened weakly weakness wilting with low resistance withering without worsening