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"欠けているか入手できないものを必要とする状態闕如
例:water is the critical deficiency in desert regions 水は砂漠地帯では決定的に不足している
lack of an adequate quantity or number; "the inadequacy of unemployment benefits"十分な量や数に欠けていること闕如