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Definition of inhibitor
inhibitor
/ɪnˈhɪbɪtər/
in · hib · i · tor
Plural:inhibitors
•Adjective:inhibitory
inhibitor Lexical Profile
CEFR
C1
Grade
10
Tier
2
Usage
Top 10k
Syllables
4
inhibitor Game Scores & Validity
Scrabble US
Scrabble UK
WWF
Wordle Guess
• noun
1
A chemical substance or biological agent that slows down, diminishes, or prevents a particular chemical reaction, enzymatic activity, or physiological process.
Example
"The patient was prescribed an enzyme inhibitor to help lower his blood pressure."
2
A person, factor, or condition that restrains, hinders, or discourages an action, development, or impulse.
Example
"High shipping costs remain a major inhibitor to the expansion of small online businesses."
Synonyms
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Word Origin & Etymology
Borrowed in the late 16th century from Late Latin inhibitor ('one who holds back'), an agent noun from Latin inhibēre ('to hold in, restrain'), formed from in- ('in, upon') and habēre ('to have, hold').
Cite this Entry
Wordmom. (2026). Definition of Inhibitor. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/inhibitor