designated driver

An individual who avoids drinking alcohol at a social engagement for the purpose of driving their companions home.

Japanese Meaning

飲酒を控え、友人や仲間を安全に自宅まで送るために運転を引き受ける人

I volunteered to be the designated driver so my friends could enjoy drinks without worrying about getting home.

私は友人が安心してお酒を楽しめるよう、飲酒をせずに車で家まで送る役を買って出ました。

Sense（1）

An individual who avoids drinking alcohol at a social engagement for the purpose of driving their companions home.

designated drivers

（ plural ）