Lacking something essential; often construed with in.
Insufficient or inadequate in amount.
Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n).
A person who is deficient.
Neat; eloquent; applicable; relevant.
Incisive; penetrating; piercing.
Evoking strong mental sensation, to the point of distress; emotionally moving.
Piquant, pungent.