(bound form) to become accustomed to; to be familiar with; to adapt to something through repeated exposure

(literary) a suffix used after adjectives or adverbs to describe an appearance or state, similar to 然 rán.

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 notice; to perceive; to become aware of