lack

• vt.不足、不十分、不在、必要性
• vi. 不足；不足；不在
• n. 不足；不足
• n.（欠如した）人名；（シニア）ラー；（英、仏、伊、比、英）ラック；（ハング）ロック

PIE*legから、滴る、浸透する、語源的にはleakと同じ。派生不足、欠陥、欠如。

lack

lack: [12] The word lack is not known to have existed in Old English, although it is by no means impossible that it did. If it was a borrowing, a possible source would have been Middle Dutch lak ‘deficiency, fault’. This has been traced back to a prehistoric Germanic *lak-, a variant of which produced English leak.
=> leak

lack (n.)

c. 1300, "absence, want; shortage, deficiency," perhaps from an unrecorded Old English *lac, or else borrowed from Middle Dutch lak "deficiency, fault;" in either case from Proto-Germanic *laka- (cognates: Old Frisian lek "disadvantage, damage," Old Norse lakr "lacking"), from PIE *leg- "to dribble, trickle" (see leak (v.)). Middle English also had lackless "without blame or fault."

lack (v.)

late 12c., perhaps from Middle Dutch laken "to be wanting," from lak (n.) "deficiency, fault," or an unrecorded native cognate word (see lack (n.)). Related: Lacked; lacking.

1. Lack of exercise can lead to feelings of depression and exhaustion.

トレーニングの欠如は抑うつと疲労を引き起こす。

2.Despite his lack of experience,he got the job.

彼は経験不足だが、この仕事を手に入れた。

3.There 's a lack of fussiness about the way he works.

彼は仕事をするときに細かいことを重視しすぎない。

4.She wrinkled her nose，piqued by his total lack of enthusiasm.

彼女は鼻をしわにして、彼のために情熱がなくて不快に感じた。

5.There 's always a lack of consistency in matters of foreign policy.

外交政策は一貫性に欠けている。