Insufficient or inadequate in amount.
Lacking something essential; often construed with in.
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.
Willing to give and share unsparingly; showing a readiness to give more (especially money) than is expected or needed.
Invigorating in its nature.
Large, more than ample, copious.
Noble in behaviour or actions; principled, not petty; kind, magnanimous.