sleep tight

短语

n. 睡得香; 睡个好觉; 睡安稳; 安眠

发音

US

释义与例句

phr.
  1. 1.

    If one keeps oneself tightly bundled one will sleep warm and rest well.

    Sleep tight! Don't let the bedbugs bite!

interj.
  1. 1.

    A farewell said shortly before going to bed; usually said between family members or good friends.

词源

The word tight is sometimes explained as here meaning “well, soundly”. However, it can just as well be interpreted in its literal sense of “firm, fast”; compare fast asleep.

来源：wiktionary