nine

Từ điển Oxford Advanced Learner 8th

nine [nine nines] BrE [naɪn] NAmE [naɪn] number
9  There are examples of how to use numbers at the entry for five.
more at dressed (up) to the nines at ↑dressed, possession is nine points/tenths/parts of the law at ↑possession
Idioms: ↑have nine lives ▪ ↑nine days' wonder ▪ ↑nine times out of ten ▪ ↑nine to five ▪ ↑whole nine yards

Word Origin:
Old English nigon, of Germanic origin; related to Dutch negen and German neun, from an Indo-European root shared by Sanskrit nava, Latin novem, and Greek ennea.

• Từ đồng nghĩa / Synonyms:
  9, ix, nine-spot, baseball club, ball club, club, IX, niner, Nina from Carolina, ennead