ダイヤモンド

だいやもんど
noun
diamond
nature
1. diamond
A precious gemstone made of crystallized carbon, prized for its hardness and brilliance. Also used figuratively and in compound expressions.
ダイヤモンドの指輪(ゆびわ)をもらった。
I received a diamond ring.
ダイヤモンドは世界(せかい)で一番(いちばん)硬(かた)い鉱物(こうぶつ)だ。
Diamond is the hardest mineral in the world.
婚約(こんやく)指輪(ゆびわ)にはダイヤモンドを選(えら)ぶ人(ひと)が多(おお)い。
Many people choose diamond for their engagement rings.

Usage

Often abbreviated to ダイヤ in casual speech and in some compound words. The abbreviation ダイヤ is also used for the diamond suit in playing cards and for train schedules (列車(れっしゃ)ダイヤ), though the schedule meaning derives from "diagram," not "diamond."

Common collocations

  • ダイヤモンドの指輪(ゆびわ): diamond ring
  • ダイヤモンド婚式(こんしき): diamond wedding anniversary (60th or 75th)
  • ダイヤモンドの原石(げんせき): uncut diamond
  • ダイヤモンドダスト: diamond dust (ice crystals in cold air)

Related Words

Synonym: ダイヤ (shortened form, also means train schedule)
general
Added 2026.2.13 5:10 · Revised 2026.10.13 11:17
11000/11038_daiyamondo