呒 (m) is a rare character, often a simplified variant of 嘸 (wǔ). In classical texts it can mean 'perplexed' or 'astonished', but in modern Chinese it is almost never used with this meaning. You are more likely to encounter it as a dialectal negative particle. The POS field lists it as a noun, but the gloss describes an adjective; this row needs human review to verify the intended sense.