• adj. 松弛的；疏忽的；不流畅的
• vi. 松懈；减弱
• n. 煤末；峡谷
• vt. 放松；使缓慢
• adv. 马虎地；缓慢地
• n. (Slack)人名；(英)斯莱克

来自古英语 slaec,疲倦的，来自 Proto-Germanic*skakas,疲倦的，来自 PIE*sleg,疲倦的，来自 PIE*sleu,无精打采的，虚弱的，懒散的，词源同 lax,slake,slow.引申诸相关词义。

slack

slack: [OE] In common with Dutch and Swedish slak, slack comes from a prehistoric Germanic *slakaz. This was derived from the same ultimate source that produced Latin laxus ‘loose’ (source of English lax, relax, release, and relish) and languēre ‘languish’ (source of English languish). The plural noun slacks was first used for ‘trousers’ in the early 19th century. (The noun slack ‘small pieces of coal’ [15] is a different word, probably borrowed from Middle Dutch slacke ‘waste produced by smelting metal’.)
=> languish, lax, relax, release, relinquish

slack (n.2)

"coal dust," mid-15c., sleck, of uncertain origin, probably related to Middle Dutch slacke, Middle Low German slecke "slag, small pieces left after coal is screened," perhaps related to slagge "splinter flying off metal when it is struck" (see slag (n.)).

slack (adj.)

Old English sl?c "remiss, lax, characterized by lack of energy, sluggish, indolent, languid; slow, gentle, easy," from Proto-Germanic *slakas (cognates: Old Saxon slak, Old Norse slakr, Old High German slah "slack," Middle Dutch lac "fault, lack"), from PIE root *(s)leg- "to be slack" (see lax).

Sense of "not tight" (in reference to things) is first recorded c. 1300. As an adverb from late 14c. Slack-key (1975) translates Hawaiian ki ho'alu. Slack water (n.) "time when tide is not flowing" is from 1769. Slack-handed "remiss" is from 1670s. Slack-baked "baked imperfectly, half-baked" is from 1823; figuratively from 1840.

slack (n.1)

early 14c., "cessation" (of pain, grief, etc.), from slack (adj.). Meaning "a cessation of flow in a current or tide" is from 1756; that of "still stretch of a river" is from 1825. Meaning "loose part or end" (of a rope, sail, etc.) is from 1794; hence figurative senses in take up the slack (1930 figuratively) and slang cut (someone) some slack (1968). Meaning "quiet period, lull" is from 1851. Slacks "loose trousers" first recorded 1824, originally military.

slack (v.)

1510s, "to moderate, make slack," back-formed from slack (adj.) after the original verb veered into the specialized sense of slake. Meaning "be remiss, inactive or idle, fail to exert oneself" is attested from 1540s; current use is probably a re-coining from c. 1904 (see slacker, and compare Old English slacful "lazy," sleacmodnes "laziness"). Related: Slacked; slacking.

1. He just gazed at me slack-jawed.

他张大了嘴巴，吃惊地盯着我。

来自柯林斯例句

2. Many publishers have simply become far too slack.

许多出版商就是变得过于懈怠了。

来自柯林斯例句

3. The boy's jaw went slack.

男孩张大了嘴巴。

来自柯林斯例句

4. She was staring into space, her mouth slack.

她双唇微张，失神地望着前方。

来自《权威词典》

5. Slack off those ropes there ; there's a storm coming!

把那里的绳索放松, 暴风雨就要来了!

来自《简明英汉词典》