入る

to enter; to go in; to get in; to come in

mainly used in fixed expressions and literary language

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

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

to do fully; to do intently; to do sincerely; to do deeply; to feel keenly

after -masu stem of verb

to (reach a state) completely

after -masu stem of verb