lag

英 [læg] 美 [læɡ]

1. lag behind sb. 落后于某人。
2. 谐音“落(这是个多音字，这里最好念：la)哥”----落后的人。
3. or from some dialectal version of last, lack, or delay.

lag 缓慢，滞后

词源不详，可能来自lug,用力拖拉。引申词义缓慢，滞后。

lag: lag: English has three distinct words lag. The verb ‘fall behind’ [16] is perhaps of Scandinavian origin (Norwegian has lagga ‘go slowly’), although a link has been suggested with the lag of fog, seg, lag, a dialect expression used in children’s games which represents an alteration of first, second, last. Lag ‘insulate’ [19] comes from an earlier noun lag ‘barrel stave’, which was also probably borrowed from a Scandinavian language (Swedish has lagg ‘stave’); the original material used for ‘lagging’ was wooden laths.

And finally the noun lag ‘prisoner’ [19] seems to have come from an earlier verb lag, which originally meant ‘steal’, and then ‘catch, imprison’; but no one knows where this came from.
lag (v.): "fail to keep pace," 1520s, earlier as a noun meaning "last person" (1510s), later also as an adjective (1550s, as in lag-mon "last man"), all of uncertain relationship, possibly from a Scandinavian source (compare Norwegian lagga "go slowly"), or some dialectal version of last, lack, or delay. Related: Lag; lagging. The noun meaning "retardation" is from 1855. First record of lag time is from 1951.

1. There's a time lag between infection with HIV and developing AIDS.: 从感染艾滋病病毒到病发有一段滞后期。

2. As conceit makes one lag behind, so modesty helps one make progress.: 骄傲使人落后, 谦虚使人进步.

3. Ten minutes later, some of runners in the race began to lag.: 十分钟后, 有些参赛的人开始落后了.

4. I staved off jet lag with a bath and an early night.: 我洗了个澡又提前睡下,免除飞行时差的反应.