Antonyms of adj sufficient

1 sense of sufficient

Sense 1
sufficient (vs. insufficient) -- (of a quantity that can fulfill a need or requirement but without being abundant; "sufficient food")

insufficient (vs. sufficient), deficient -- (of a quantity not able to fulfill a need or requirement; "insufficient funds")
        => depleted, low -- (no longer sufficient; "supplies are low"; "our funds are depleted")
        => inadequate, poor, short -- (not sufficient to meet a need; "an inadequate income"; "a poor salary"; "money is short"; "on short rations"; "food is in short supply"; "short on experience")
        => lean, skimpy -- (containing little excess; "a lean budget"; "a skimpy allowance")
        => light, scant (predicate), short -- (less than the correct or legal or full amount often deliberately so; "a light pound"; "a scant cup of sugar"; "regularly gives short weight")
        => shy (predicate) -- (short; "eleven is one shy of a dozen")

Similarity of adj sufficient

1 sense of sufficient

Sense 1
sufficient (vs. insufficient) -- (of a quantity that can fulfill a need or requirement but without being abundant; "sufficient food")
       => adequate, decent, enough -- (sufficient for the purpose; "an adequate income"; "the food was adequate"; "a decent wage"; "enough food"; "food enough")
       => comfortable -- (sufficient to provide comfort; "a comfortable salary")
          Also See-> ample#1