油断 (Yudan) is a Japanese noun meaning “negligence, carelessness, inattention, unpreparedness”.
Meanings
- noun, suru verb, intransitive verbnegligence; carelessness; inattention; unpreparedness
Examples
油断してはいけません。
You'd better stay on your guard.
罠かもしれん、油断するな。
It could be a trap; don't let your guard down.
私は油断していたことに気づいた。
I realized I was off my guard.
Sentences from Tatoeba (CC BY 2.0 FR).