Not sufficient; lacking competent power or ability; unqualified, unequal, unfit.
Not sufficient; of a type or kind that does not suffice, that does not satisfy requirements or needs.
An inadequate quantity of; not enough.
A quantity (of something) that is less than is needed.
Not noble; ignoble; base.
Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily.
To make (someone or something) no longer noble