vow / swear / pledge

underpass

八ヶ月: 8 months

(rail transport) rapid transit, metro; (AmE) subway; (BrE) underground; (BrE) tube (abbr. 地下鉄)

半円: semicircle

岩塩: rock salt

(idiomatic) to be out of breath

grebe / little grebe

柔艶: slender and beautiful / 柔婉: straightforward and kind

十円: ten yen / 重縁: an additional tie to a family or household to which one is already related by blood or marriage, such as by an additional inter-family marriage / 獣苑: (rare, archaic) a zoo