mate

The male bird sings loudly to attract a mate.

そのオスの鳥はつがいの相手を引き寄せるために大声で鳴く。

He has been best mates with his neighbor since they were children.

彼は子どもの頃から隣人と親友だ。

After years of searching, the wolf finally found a mate and raised pups.

長年探し続けた末に、そのオオカミはついつがいの相手を見つけ子を育てた。