闘志: a male or female given name

東下: to go east / 投下: to invest / 透過: to penetrate / 糖化: to saccharify / 登科: to pass the civil service test

投下: investment / 透過: penetration / 灯火: lamp / 等価: equivalence / 糖化: saccharification / 灯下: by lamp / 踏歌: an ancient dance / 藤花: wisteria flower / 頭花: flower head / 東下: going east / 刀下: under the sword

等価: equivalent

(Hachijō) father

奪格: ablative case

余角: (mathematics) a complementary angle / 与格: (grammar) the dative case / 四画: four strokes

下矩: quadrature (astronomy)

格: a male given name / 郭: a Chinese surname

確認: confirmation