insufficient

(ĭn'sə-fĭsh'ənt)
adj.
Not sufficient; inadequate.

insufficiently in'suf·fi'cient·ly adv.

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is a useful word because enough has no corresponding negative form, but not enough is often more natural and usually less formal-sounding. Another alternative in some contexts is inadequate, which can refer to quantity as well as quality.

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adjective

Not enough to meet a demand or requirement: deficient, inadequate, scarce, short, shy¹, under, wanting. See big/small/amount, excess/insufficiency/enough.

adj

Definition: not enough; lacking
Antonyms: adequate, ample, enough, sufficient

For a list of words related to insufficient, see:

• Weak, Fearful, or Anxious

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  See crossword solutions for the clue Insufficient.

Dansk (Danish)
adj. - utilstrækkelig, uduelig, insufficient, mangelfuld

Nederlands (Dutch)
onvoldoende, ontoereikend

Français (French)
adj. - insuffisant

Deutsch (German)
adj. - ungenügend, unzulänglich

Ελληνική (Greek)
adj. - ανεπαρκής

Italiano (Italian)
insufficiente

Português (Portuguese)
adj. - insuficiente

Русский (Russian)
недостаточный, непригодный

Español (Spanish)
adj. - insuficiente

Svenska (Swedish)
adj. - otillräcklig, otillfredsställande, insufficient (med.)

中文（简体）(Chinese (Simplified))
不够的, 不充足的, 不能胜任的

中文（繁體）(Chinese (Traditional))
adj. - 不夠的, 不充足的, 不能勝任的

한국어 (Korean)
adj. - 불충분한, 능력이 없는

日本語 (Japanese)
adj. - 不十分な, 不足な, 不適当な

العربيه (Arabic)
‏(صفه) غير كاف‏

עברית (Hebrew)
adj. - ‮לא מספיק‬

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