The most common Korean word for “cannot” is 못 (mot). There is one more word with a similar meaning — compare them below. 「cannot」는 한국어로 못.
cannot (used before a verb)
TOPIK 1 · noun
to prevent from; to be unable to
TOPIK 1 · verb
Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato
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