不注意で大事なミスを犯してしまった

N3 不 fu un(~), non(~), negative prefix N4 注意 chuui attention, caution, warning N4 大事 daiji important, valuable, serious matter N3 ミス misu mistake, error, miss N3 しまった shimatta darn, too bad, I messed up

N4 不 fu, bu negative, non-, bad N4 注 chuu / soso.gu, sa.su, tsu.gu pour, irrigate, shed (tears) N4 意 i idea, mind, heart N5 大 dai, tai / oo-, oo.kii, -oo.ini large, big, grand N4 事 ji, zu / koto, tsuka.u, tsuka.eru matter, thing, fact N3 犯 han, bon / oka.su crime, sin, offense

N4 〜てしまう te shimau Indicates completed action with nuance of regret, surprise, or unexpected result, attaches to the te-form verb N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context