Japanese meaning of 油断大敵

Reading:
ゆだんたいてき (yudan taiteki)

English Translation:

Carelessness leads to disaster

Meaning & Cultural Context

Meaning:


A warning that even a brief lapse in attention or a small act of carelessness can lead to major trouble or failure.

Cultural Context:


From martial arts and military language, now common in safety campaigns and sports coaching.

Grammar & Learning Points

Grammar Point

• Noun phrase modifying “だ” or “である” to warn about complacency.

Trap for English Speakers

May be misunderstood as warning only in combat, missing everyday safety usage.

Example

Basic Example

試合での油断は大敵だ。

Letting your guard down in a game is the greatest enemy.


Applied Example

試合終了間際の失点。油断大敵を痛感した。

A goal conceded in the final moments — a harsh lesson that carelessness is your worst enemy.