to enter; to come in; to join (a club, company, etc.); to enter (a university, the army, etc.); to be contained (in); to be included (in); to (be able to) fit (in a container, building, etc.)
Examples (5 in total)
風で砂が口に入った。
The wind blew sand into my mouth.
昔は砂糖がなかなか口に入らなかった。
In the old days, people rarely got to eat sugar.
こんな高い肉は、めったに口に入らない。
We rarely get to eat meat this expensive.
口に入った瞬間、彼は目を見開いて固まる。
The moment it enters his mouth, his eyes go wide and he freezes.
食べ物を口に入れる最も良い方法は何だろう。
What is the best way of getting food into the mouth?