Definition of insufficient :
1. Not sufficient; not enough; inadequate to any need, use, or purpose; as, the provisions are insufficient in quantity, and defective in quality.
2. Wanting in strength, power, ability, capacity, or skill; incompetent; incapable; unfit; as, a person insufficient to discharge the duties of an office.
few (part of speech: adjective)
deficient (part of speech: adjective)
incomplete (part of speech: adjective)
incomplete, undone, discontinuous, partial, missing, unachieved, immature, embryonic, unaccomplished, curtailed, segmental, patchy, sectional, deficient, unsatisfactory, unfinished, short, unfulfilled, scanty, fragmentary, fractional, unattained, lacking
insufficient (part of speech: adjective)
unacceptable (part of speech: adjective)
- I had only ten or twelve guineas left, and this sum was insufficient. - "The Memoires of Casanova, Complete The Rare Unabridged London Edition Of 1894, plus An Unpublished Chapter of History, By Arthur Symons", Jacques Casanova de Seingalt.
- It may be insufficient. - "The Club of Queer Trades", G. K. Chesterton.
- The light was insufficient to show the expression upon the speaker's face, but his voice told of a great wonder. - "The Quest of the Sacred Slipper", Sax Rohmer.