mismatch

UK: /ˈmɪsmætʃ/

US: /mɪsˈmætʃ; for n. also ˈmɪsˌmætʃ/

US: (mis mach′; for n. also mis′mach′)

WordReference Random House Learner's Dictionary of American English © 2025

mis•match /mɪsˈmætʃ; for 2. also ˈmɪsˌmætʃ/   v. 

[~ + object]
1. to match badly or unsuitably:
   The two were completely mismatched and never should have gotten married.

n. [countable]

2. a bad or unsuitable match:
   The game was a complete mismatch.

WordReference Random House Unabridged Dictionary of American English © 2025

mis•match  (mis mach′; for 2 also mis′mach′), v.t. 

1. to match badly or unsuitably.

n. 

2. a bad or unsatisfactory match.

• mis-¹ + match² 1590–1600

Collins Concise English Dictionary © HarperCollins Publishers::

mismatch / ˌmɪsˈmætʃ/ verb

1. to match badly, esp in marriage

noun

1. a bad or inappropriate match