Synonyms of lacking

Verb

1. miss, lack

usage: be without; "This soup lacks salt"; "There is something missing in my jewelry box!"

Adjective

1. deficient, lacking(predicate), wanting(predicate), inadequate (vs. adequate), unequal

usage: inadequate in amount or degree; "a deficient education"; "deficient in common sense"; "lacking in stamina"; "tested and found wanting"

2. lacking, absent, missing, wanting, nonexistent (vs. existent)

usage: nonexistent; "the thumb is absent"; "her appetite was lacking"

Definition and meaning of lacking (Dictionary)