Partner
Companion, Opponent
noun
あいて
相手 (あいて) Partner, Companion, Opponent
配偶者 (はいぐうしゃ) Spouse, Partner
愛 (あい) Love
Yuri says 相手 doesn't imply a romantic partner. She says it usually has a word in front to describe the type of partner.
Partners 相手 share a mutual 相 hand 手