Synonyms of momentary in English:

momentary


See US English definition of momentary

See UK English definition of momentary

See Spanish definition of momentáneo

adjective

1‘Jamieson didn't see the momentary flash of panic in her eyes’

SYNONYMS
brief, short, short-lived, quick, fleeting, passing, transient, transitory, ephemeral, evanescent, fugitive, temporary, impermanent
rare fugacious
ANTONYMS

lengthy, lasting, permanent