Lack

n.	1.	Blame; cause of blame; fault; crime; offense.
	2.	Deficiency; want; need; destitution; failure; as, a lack of sufficient food. She swooneth now and now for lakke of blood. - Chaucer. Let his lack of years be no impediment. - Shak.
v. t.	1.	To blame; to find fault with. [imp. & p. p. Lacked (lăkt); p. pr. & vb. n. Lacking.] Love them and lakke them not. - Piers Plowman.
	2.	To be without or destitute of; to want; to need. If any of you lack wisdom, let him ask of God. - James i. 5.
v. i.	1.	To be wanting; often, impersonally, with of, meaning, to be less than, short, not quite, etc. What hour now? I think it lacks of twelve. - Shak. Peradventure there shall lack five of the fifty. - Gen. xvii. 28.
	2.	To be in want. The young lions do lack, and suffer hunger. - Ps. xxxiv. 10.
interj.	1.	Exclamation of regret or surprise.

Noun	1.	lack - the state of needing something that is absent or unavailable; "there is a serious lack of insight into the problem"; "water is the critical deficiency in desert regions"; "for want of a nail the shoe was lost" Synonyms: deficiency, want
Verb	1.	lack - be without; "This soup lacks salt"; "There is something missing in my jewellery box!" Synonyms: miss

absence, adulteration, arrearage, awayness, bare cupboard, bare subsistence, be found wanting, be in want, be insufficient, be pinched, be poor, beggarliness, beggary, blank, break, collapse, come short, decline, defalcation, default, defect, defectibility, defectiveness, deficiency, deficit, deprivation, destitution, discontinuity, drought, empty purse, erroneousness, fail, fail of, fall away, fall short, fall shy, fallibility, famine, faultiness, gap, go on welfare, grinding poverty, gripe, hand-to-mouth existence, hiatus, homelessness, immaturity, impairment, imperfection, impoverishment, impurity, inaccuracy, inadequacy, inadequateness, incompleteness, indigence, inexactitude, inexactness, insufficiency, interval, kick the beam, lacuna, lag, lose ground, mediocrity, mendicancy, miss, missing link, moneylessness, necessitousness, necessity, neediness, neverness, nonexistence, nonoccurrence, nonpresence, not answer, not hack it, not make it, not make out, not measure up, not qualify, not stretch, not suffice, nowhereness, omission, outage, patchiness, paucity, pauperism, pauperization, penury, pinch, privation, require, run short, run short of, scantiness, shortcoming, shortfall, sketchiness, slump, starvation, starve, stop short, subtraction, ullage, underage, undevelopment, unevenness, unperfectedness, unsoundness, wantage