あっちゃ
accha

Interjection

1. oops; uh oh; drats

「あっ、後続 こうぞくのパーティが たみたいだな」「あちゃー。休 やすんでる あいだ いつかれちゃったわね」
"a' kōzokuno pātiga kita mitaidana" "achā. yasunderu aidani oitsukarechattawane"
"Ah, the trailing group has arrived." "Oh no. They caught up with us while we were resting."
Other forms: