a.

1. 鬆弛的，不緊的；不嚴的
2. 懈怠的；疏忽的；馬虎的
3. 閒的，呆滯的，蕭條的
4. （水流等）平緩的；遲鈍的
5. 不堅定的，軟弱的

vt.

1. 放鬆，使鬆弛
2. 減緩，使平緩
3. 馬虎從事，鬆垮地做

vi.

1. 放鬆，變鬆弛[（+off/up）]
   It's natural to slack off towards the end of a hard day's work.

   一天緊張工作快結束的時候有些放鬆是自然的。

2. 減緩；減弱；變呆滯
3. 懶散；懈怠；馬虎

n.

1. （繩索等的）鬆弛部分[U]
2. 鬆弛；懈怠；懶散[U]
3. （水流等的）遲緩；靜止不動[U]
4. 淡季；蕭條（期）[C][U]
   There's a certain amount of slack in the car industry at the moment.

   眼下汽車工業不太景氣。

5. 寬鬆長褲；便褲[P]

ad.

1. 馬虎地；鬆懈地
2. 緩慢地；沒精打采地
3. 清淡地；呆滯地
4. 鬆弛地，寬鬆地

n.

1. 煤屑，煤末[U]

n.

1. 【英】峽谷；凹地；沼澤[C]

adj.

1. not taut or held tightly in position; loose.
2. (of business or trade) not busy; quiet.
3. careless, lazy, or negligent.
4. W. Indian lewd or promiscuous.
5. (of a tide) neither ebbing nor flowing.

n.

1. the part of a rope or line which is not held taut.
2. (slacks) casual trousers.
3. informal a period of inactivity or laziness.

v.

1. loosen (something, especially a rope).
2. (slack off/up) decrease in intensity or speed.
3. Brit. informal work slowly or lazily.
4. slake (lime).

n.