夜半, やはん
middle of the night, dead of night
我々はしゃべりづめで夜半まで起きていた。
夜半, よわ
night, middle of the night
我々はしゃべりづめで夜半まで起きていた。
に
Particle
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), with
5. by, from