inadequate
Americanadjective
-
not good enough for the purpose; inept or unsuitable.
This old tent they gave us is completely inadequate—it’s equally bad at keeping out both the rain and the bugs!
- Synonyms:
- imperfect, defective, incommensurate, incompetent, inapt, incomplete
- Antonyms:
- sufficient
-
not sufficient for the purpose; not enough.
The set of linens we received was so inadequate, we were asking friends for a loan of napkins and tablecloths.
-
Psychiatry. ineffectual in response to emotional, social, intellectual, and physical demands in the absence of any obvious mental or physical deficiency.
adjective
-
not adequate; insufficient
-
not capable or competent; lacking
Other Word Forms
Etymology
Origin of inadequate
Explanation
Something inadequate doesn't cut it. If you lack just a few centimeters to reach the low mark on the wooden sign, your height is inadequate for riding the big roller coaster. Wear heels next time. The Latin root of adequate means "equal to," so inadequate refers to things that aren't equal to what is expected or needed. Something can be naturally inadequate, as in "inadequate rainfall to stop the fire," or it can result from lack of effort, as when someone avoids a question: "Your response was totally inadequate. Tell me what really happened."
Vocabulary lists containing inadequate
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Paltry Parlance: Synonyms for "Few"
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Under fire for what critics say is inadequate protection of its young user base, Roblox nevertheless remains incredibly popular.
From Slate • May 17, 2026
Decades of inadequate investment in social housing, sluggish construction rates, and Australia's restrictive planning laws - which limit homes being built where most people want to live – have taken a toll.
From BBC • May 12, 2026
The result is a patchwork of wildly unequal and inadequate representation.
From Los Angeles Times • May 6, 2026
They don’t allege inadequate warnings about known risks.
From The Wall Street Journal • May 5, 2026
Throughout his life, Kepler used astrology as a means to supplement his always inadequate income.
From "The Scientists" by John Gribbin
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
