A person who is deficient.
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 miserable person; a wretch.
A state of misery or melancholy.
In a state of misery: very sad, ill, or poor.
Wretched; worthless; mean; contemptible.
Very bad (at something); unskilled, incompetent; hopeless.
Of the weather, extremely unpleasant due to being cold, wet, overcast, etc.