
to enter; to go in; to get in; to come in
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
to (reach a state) completely
「入る」 has another reading with different meanings.
to enter; to come in; to go in; to get in; to arrive
to listen attentively to; to be absorbed in (listening to)
to fall asleep
to be deeply impressed (by); to be moved (by); to admire greatly
to expire; to die; to draw one's last breath
to go into; to come into; to penetrate; to get in; to step in (a house)
日が山に入って辺りが暗くなった。
The sun went behind the mountain and the surroundings grew dark.
太陽がもう入るね。
The sun is setting already, isn't it?
彼は悟りに入った。
He attained enlightenment.