to put one's heart and soul into

material or objects used to fill in gaps or cracks, or to pad / (typography) an interglyph or interline space, or a physical object used to make such space

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)

(Buddhism) think on the power of Kannon

(literally) know the other side and yourself, a hundred battles will not be perilous