close friend, bosom buddy / crony, chum

蛙: frog

換える, 替える, 代える: to exchange, substitute / 変える: to change / 易える: to change

potential form of かう (kau) [godan]

火炎, 火焔: flame, blaze / 花園: flower garden / 佳宴: congratulatory banquet / 窩縁, か縁: cavity margin (e.g. tooth, body)

(chiefly women's speech) first person singular pronoun: I, me

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me

personal, private / secret