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夜更かし， 夜更し， 夜ふかし， よふかし
1. staying up late, keeping late hours, sitting up late at night, nighthawk
tbd
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慣れる， 馴れる， なれる
1. to get used to, to grow accustomed to, to become familiar with
2. to become skilled in, to become experienced at
3. to become tame, to become domesticated
4. to get used to doing
习惯于，逐渐习惯于，熟悉于；精通于，熟练于；变得驯服，变得家养；习惯于做某事
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd