お互いに

おたがいに

mutually, with each other, reciprocally, together, both

お互い様

おたがいさま

we are of equal status in this regard

困った時はお互い様

こまったときはおたがいさま

next time it will be me who needs your help; when times are tough, we should help each other; we are all in this together

互い

たがい

mutual, reciprocal

互いに

たがいに

mutually, with each other, reciprocally, together

互い違い

たがいちがい

alternate, alternation

相互互換性

そうごごかんせい

interoperability

相身互い

あいみたがい

mutual assistance, mutual sympathy

相互いに

あいたがいに

mutually; with each other; reciprocally; together

互いに素

たがいにそ

disjoint

素（互いに…）

もと（たがいに…）

coprime

交互

こうご

mutual, reciprocal, alternate

相互

そうご

mutual, reciprocal

互譲

ごじょう

conciliation, compromise

互換

ごかん

transposition, interchange

互市

ごし

trade, commerce

互助

ごじょ

mutual aid, cooperation, benefit

互選

ごせん

mutual election, co-opting

互に

かたみに

mutually, reciprocally, together