ダイヤ
だいや
noun
diamond; train schedule
1.
diamond
A precious gemstone; the diamond suit in cards.
2.
train schedule, timetable
The scheduled times for train operations (short for ダイヤグラム).
ダイヤ has two main meanings:
1. DIAMOND:
- ダイヤの指輪: 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):
- ダイヤが乱れる: schedule is disrupted
- ダイヤ改正: timetable revision
- ダイヤ通り: 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).