てっする
Meanings
Verb (する)
1. to penetrate; to sink in
2. to devote oneself (to); to do intently and exclusively
3. to do throughout (e.g. the night)
Pitch accent
っする
っす
Used in vocabulary (3 in total)
to stay up all night; to sit up all night; to do something all night
to have a deep grudge; to bear deep resentment towards someone
to (be able to) read between the lines