Used in games or contests when the result is a tie; common in rock-paper-scissors.
It was a draw in rock-paper-scissors.
The match ended in a tie.
Used when two parties are even after settling a debt, score, or exchange; often in the phrase あいこにする.
Now we're even on debts.
You treated me, so next time I'll treat you and we'll call it even.
We tied three times at rock-paper-scissors.
Let's just call this match a tie.
We said "aiko de sho!" and played rock-paper-scissors again.
互角 describes two sides being closely matched in ability during a contest, while あいこ describes the actual result being a tie.
quits; even; square
Usually written in kana; the kanji forms 相子 and 相こ are ateji and rare.
Ateji spelling; rarely used in modern writing.
Mixed kanji-kana spelling; rarely used.
The origin is uncertain. 相子 is a conventional spelling in which 相 represents mutuality; 子 does not carry its ordinary meaning “child.”