Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings

To be located at, in, or on; to be present or at home.

(bound form) used as a suffix for certain adjectives or adverbs to emphasize a state or feeling; for example in 几乎 jī​hū or 似乎 sì​hū