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to come together; to merge; to unite; to meet
to fit; to match; to suit; to agree with; to be correct
to be profitable; to be equitable
to do ... to each other; to do ... together
この靴は足に合っていて歩きやすい。
These shoes fit my feet well and are easy to walk in.
このサイズは私に合います。
This size fits me.
色が合うかどうか試してみよう。
Let's try and see if the colors match.