lack

v. be short of; be without, be missing; need, want

n. need, want; shortage; absence

To lack something is to not have it.Lack can also refer to:Lack Township, Pennsylvania.Lack, County Fermanagh, Northern Ireland.
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Noun
1. 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"
(synonym) deficiency, want
(hypernym) need, demand
(hyponym) absence
(derivation) miss
Verb
1. be without; "This soup lacks salt"; "There is something missing in my jewellery box!"
(synonym) miss
(hyponym) want
(derivation) deficiency, want

n. lac, lacquer, varnish, glaze, enamel

v. varnish, cover, plate

(v. t.)
To blame; to find fault with.
  

(v. t.)
To be without or destitute of; to want; to need.
  

(v. i.)
To be wanting; often, impersonally, with of, meaning, to be less than, short, not quite, etc.
  

(v. i.)
To be in want.
  

(n.)
Deficiency; want; need; destitution; failure; as, a lack of sufficient food.
  

(n.)
Blame; cause of blame; fault; crime; offense.
  

(interj.)
Exclamation of regret or surprise.