physically painful; to ache; to feel a sore or sharp pain

(bound form) a feeling or emotion; also used as a suffix for a "sense of" something, such as a 责任感 zé​rèn​gǎn or 幽默感 yōu​mò​gǎn

(adverb) thoroughly; deeply; to one's heart's content, often describing an action done with great intensity or vigor

to feel; to perceive; to sense; to realize