Change
Substitution, Shift
noun, verbal noun
If you mix and substitute two people, that's a change of personnel, or a substitution. Perhaps those people are even working in shifts, so they mix and substitute each other at regular intervals.
You'll see this word in pretty diverse contexts, because it can refer to anything from a change of political regime, to the substitution of a player during a match, to factory shifts. The underlying meaning is that one person or group is switched out with another.
This is a jukugo word that uses the on'yomi readings of the kanji. You haven't learned this reading for 代 yet, so here's a mnemonic to help you:
A change calls for a tie (たい). If you're the new company president, or you're going in to work to start your shift, you'd better make sure you look the part, so get that tie nice and straight.
ラグビーなど、多くのスポーツで交代のルールがあります。
In many sports, such as rugby, there are rules for substitution.
父と母は毎日交代で夜ごはんを作ります。
My father and mother take turns making dinner every day.
先日、十六年ぶりに社長交代がありました。
The other day, there was a change of company president for the first time in sixteen years.
そろそろ交代してもらえませんか？
Could you switch in for me soon?