油断

ゆだん

negligence, carelessness, inattention, unpreparedness

油断大敵

ゆだんたいてき

Unpreparedness is one's greatest enemy, He that is too secure is not safe

油断なく

ゆだんなく

alertly, vigilantly, warily, diligently, attentively

油断禁物

ゆだんきんもつ

be on your guard!, take care!

油断は禁物

ゆだんはきんもつ

be on your guard!, take care!

せん断強さ

せんだんつよさ

shear strength

断る

ことわる

to refuse, to reject, to dismiss, to turn down, to decline

油断ならない

ゆだんならない

treacherous; dangerous; untrustworthy; sneaky; cunning

せん断

せんだん

shear, shearing

させる

to make (someone) do

断じる

だんじる

to draw the conclusion that..., to conclude

断ずる

だんずる

to decide, to determine

油をさす

あぶらをさす

to oil (e.g. chains, hinges, etc.)

油断のならない

ゆだんのならない

treacherous; dangerous; untrustworthy; sneaky; cunning

油断も隙もない

ゆだんもすきもない

one must constantly be on one's guard with..., one cannot be too careful of...

油染みる

あぶらじみる

to become greasy; to be oil-stained

油を絞る

あぶらをしぼる

to chew out, to reprimand severely, to rake over the coals, to give a sound scolding, to tell someone off, to scold, to rebuke

油を売る

あぶらをうる

to loaf (particularly on the job), to idle one's time away, to dawdle

せん断流

せんだんりゅー

shear flow