retainer

Nghĩa (Tiếng Anh)

  1. Any thing or person that retains.
  2. A dependent or follower of someone of rank.
  3. A paid servant, especially one who has been employed for many years.
  4. A fee one pays to reserve the other's time for services.
  5. A device that holds teeth in position after orthodontic treatment.
  6. A retaining valve.

Tính thường xuyên

C2
Phát âm là (IPA)
/ɹɪˈteɪn.ə/
Từ nguyên (Tiếng Anh)

From retain + -er.

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