What is the meaning of てこい?


> 残りの夏休み遊べないのは残念だけど ゆっくりしてこい!

So he tells his friend who is moving soon to another town

> 残りの夏休み遊べないのは残念だけど  
>  it's too bad we won't be able to play anymore for the remaining days of
> summer, but

> ゆっくりしてこい!

"Take it easy"? What meaning does てこい provide here?




This (-て)くる here means "and then come back". So the literal translation is
"Have a relaxing time and come back".

You probably don't see the need for this kind of くる right now because saying
"and then come back" is completely unnecessary in English in a situation like
this. However, it's important in Japanese when describing doing something in a
distant place and returning to your current location. In Japanese, just saying
ゆっくりしろ in this context would sound awfully unnatural.

For more examples, see: [What does やってくる mean in this
sentence?](https://japanese.stackexchange.com/q/95301/5010)

Conversely, a ryokan host commonly says ゆっくりして **いって** ください to their guests,
which literally means "Relax and then leave". In English, saying "and then
leave" is not only unnecessary but even hostile, so it is usually just
translated as "Make yourself at home" or something like that.

