研究社 新和英中辞典

ゆだん 油断

〈怠慢〉 neglect; 【形式ばった表現】 negligence

〈不注意〉 carelessness; 【形式ばった表現】 inattention

〈不用意〉 【形式ばった表現】 unpreparedness

油断する

〈警戒を怠る〉 relax one's guard; be off one's guard 《toward》

〈不注意である〉 be inattentive; be careless; 【形式ばった表現】 be negligent

油断しない

〈警戒する〉 be on one's guard 《against》; be on the alert [lookout] 《for》; have [keep] one's wits about one;〈注意する〉 be careful 《about》; 【形式ばった表現】 use caution 《in》

油断させる

throw [put] somebody off his guard

油断している時に

when one is off guard

油断しているところを襲う

catch somebody off guard

油断のない

〈警戒の厳しい〉 watchful; alert; guarded

〈注意深い〉 careful; cautious; 【形式ばった表現】 vigilant

油断のならない

cunning

sly

tricky

treacherous

【形式ばった表現】 insidious

full of danger

用例

油断は禁物だよ. You've got to be on your guard [toes]. 高速道路では, ほんの一瞬の油断が命とりになることもある. When you are driving on a superhighway [《主に英国で用いられる》 motorway], a moment's carelessness can cause a fatal accident. あの男には油断をするな. Don't take your eyes off him.｜You must keep a strict watch on him.

油断も隙(_すき)もない

用例

あの男は油断も隙もあったものではない. You cannot be too careful around him. 近ごろの世の中ときたら油断も隙もあったものではない. One must always be on one's guard in the world these days.｜You can't afford to relax your guard for a moment these days.

油断大敵

用例

油断大敵. Don't be too sure of yourself!｜Overconfidence [Carelessness] can be very dangerous. 油断大敵火がぼうぼう. False security is a great foe.

斎藤和英大辞典

油断

読み方 ゆだん

名詞

1

Unguardedness; heedlessness; want of caution; lack of vigilance; inattention; security:（=する） to be unguarded; to be off one's guard; to be incautious; to revel in security; to relax one's attention; to take one's eyes off; to be caught napping:（他動詞構文に用いれば）to take no heed of （dangers）; to be heed less of （dangers）

用例

油断したのが悪かった
I was unguarded―off my guard―revelling in security.

彼は決して油断をせぬ
He is never off his guard―ever on his guard.

ロシア人は旅順を金城鉄壁と恃んで油断しておった
The Russians looked upon Port Arthur as impregnable, and were revelling in fancied security.

瞬時も油断はできぬ
You can't take your eyes off―look off―for a moment.

この子はいたずらで油断も隙も有ったものじゃない
The child is so mischievous that you can't take your eyes off him for a moment.

相手の油断した隙を狙え
Watch for a moment when your man is off his guard!―Take your man off his guard!

手習いは坂に車を押す如く油断をすると後へ戻るぞ
He who learns to write pushes a cart up a slope. Let him relax his efforts ever so little, and down he goes backward.

油断大敵
“Security is a great enemy.”

2

用例

油断に乗ずる
to take one off one's guard―take one unawares―catch one napping

彼は油断に乗ぜられたのだ、油断をして不意を打たれた
He was taken off his guard―taken unawares―caught napping.

油断をして不意を打たるるな
Don't suffer yourself to be taken off your guard!―Don't let them catch you napping!

3

用例

油断させる
to throw one off one's guard

あれは我々に油断をさせる手段だ
That is a ruse to throw us off one guard.

4

用例

油断するな、ご油断召さるな
Beware!―Be on your guard!―Look sharp about you!―You must have all your eyes about you―You must have all your wits about you.

油断すると負けるぞ
Look sharp about you, or you will get beaten.

あの人達と取引をする時は油断するな
You must have all your wits about you in dealing with those men.

あの人には油断するな
Beware of that man!―Guard against that man!―Take heed of that man!

あれは悪い人間だから油断するな
You must beware of that man―guard against that man―take heed of that man―（他動詞構文にすれば）―I must warn you against that man―caution you against that man―put you on your guard against that man.

賞める人には油断をするな
Beware of the man who praises you!

十七娘に油断するな
Take heed of a young wench!

美しい女房持ったら油断するな
Look sharp after a pretty wife!

5

用例

油断がならぬ
I must be on my guard.

相手が相手だから油断がならぬ
I must be on my guard, for I have no common enemy to deal with.

君は目が早いから油断がならぬ
I must be on my guard against you, for you have such a quick eye.

実に油断のならぬ世の中だ
This is a world where one must have all one's wits about one.

今時の姐さん油断がならぬ
Take heed of a modern fair one!

十六娘は油断がならぬ
There is no trusting a girl of fifteen―Fifteen is a dangerous age for maidens.

あれは油断のならぬ奴だ
He is a sly fox.

お爺さんなかなか油断がならんぞ
The sly old dog!

あれは女にかけては油断のならぬ男だ
He has a bit of the devil in him.

6

用例

油断無き
vigilant―watchful―alert―heedful―cautious―wary

あの男は挙動があやしいから油断無く注目せよ
His movements are suspicious, Keep a vigilant eye on him!―Keep a watchful eye on him!―Keep an eye on him!―Have an eye on him!

油断無く敵を警戒せよ
Be on the alert for the enemy!

道中ご油断無く
I wish you a safe journey.

JMdict

油断

読み方：ゆだん

（名詞、サ変名詞） negligence; unpreparedness

JST科学技術用語日英対訳辞書

油断

carelessness; negligence

日本語WordNet(英和)

油断

【名詞】

1 negligence, neglect, carelessness, nonperformance

道理をわきまえた人が同じ状況下で行う思慮のない行動

(failure to act with the prudence that a reasonable person would exercise under the same circumstances)

2 inattention

注意不足、無頓着

(lack of attention)

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