1
to be added to;to be appended
これがごく最近私の蔵書に加わった本です。
This is the latest acquisition to my library.
2
to join in (e.g. a group of friends);to participate
あなたはどちらのグループに加わりたいですか。
Which group do you want to join?
3
to increase (e.g. heat);to gain in (e.g. influence);to grow;to gather (speed)
彼女が泣いたことで、この話にはそれだけ信憑性が加わった。
Her tears gave more credence to the story.
4
to be applied (e.g. heat, pressure);to be exerted