ダイヤ

だいや
noun
diamond; train schedule
1. diamond
A precious gemstone; the diamond suit in cards.
I received a diamond ring.
I played the three of diamonds.
婚約(こんやく)指輪(ゆびわ)には、(ちい)さなダイヤがいくつも()いていた。
The engagement ring had many small diamonds set in it.
2. train schedule, timetable
The scheduled times for train operations (short for ダイヤグラム).
Train schedules are disrupted due to an accident.
台風(たいふう)のあと、ダイヤが正常(せいじょう)(もど)るまで時間(じかん)がかかった。
After the typhoon, it took time for the train schedule to return to normal.
来月(らいげつ)からダイヤ改正(かいせい)で、(あさ)電車(でんしゃ)()える。
Starting next month, the timetable revision will add more morning trains.

ダイヤ has two main meanings:

1. DIAMOND:

  • ダイヤの指輪(ゆびわ): diamond ring
  • ダイヤモンド: diamond (full form)
  • ダイヤ (cards): diamonds suit

2. TRAIN SCHEDULE (short for ダイヤグラム):

  • ダイヤが(みだ)れる: schedule is disrupted
  • ダイヤ改正(かいせい): timetable revision
  • ダイヤ(どお)り: on schedule

The train schedule meaning comes from the diagram (ダイヤグラム) showing train movements on a time-distance graph, historically shaped like a diamond pattern.

For the card suit, ダイヤ is one of four suits: ハート (hearts), ダイヤ (diamonds), スペード (spades), クラブ (clubs).