the other side; the other party; the other end
Refers to the opposing person, group, or end in a communication, negotiation, or conflict. Often used in business, legal, or telephone contexts.
See also: 相手 (あいて)
In negotiations, it's important to listen carefully to the other party's demands.
電話の相手側の声が小さくて聞き取りにくかった。
The voice on the other end of the phone was quiet and hard to hear.
Compound of 相手 (aite, 'partner; opponent') + 側 (gawa, 'side').