1. to enter; to go in; to get in; to come in (mainly used in fixed expressions and literary language)

2. to set (of the sun or moon); to sink; to go down

3. to attain (nirvana, enlightenment, etc.); to achieve; to reach (e.g. a climax)

4. to do fully; to do intently; to do sincerely; to do deeply; to feel keenly (after -masu stem of verb)

5. to (reach a state) completely (after -masu stem of verb)