Insufficiency, n.
Etymology: [L. insufficientia: cf. F. insuffisance, whence OE. insuffisance. See Insufficient.]
1. The quality or state of being insufficient; want of sufficiency; deficiency; inadequateness; as, the insufficiency of provisions, of an excuse, etc. The insufficiency of the light of nature is, by the light of Scripture, . . . fully supplied. Hooker.
2. Want of power or skill; inability; incapacity; incompetency; as, the insufficiency of a man for an office.
Shades of meaning
Fernald lists insufficiency only as an antonym, under excess.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given