coo
Word family nouncooingverbcooadverbcooingly
coo1 /kuː/ verb → coup2 [intransitiveI, transitiveT]SAY to make soft quiet sounds, or to speak in a soft quiet way 低声细语,轻柔地说 ‘Darling, ’ she cooed. “亲爱的。”她柔声说道。
—coo noun [countableC]
→ bill and coo at bill2(3) coo2 interjection British EnglishBrE SURPRISEDused to express surprise 啊,呀〔表示惊讶〕 Coo! That must have cost a lot! 啊,那一定花了很多钱!
From Longman Business Dictionary
Origin coo (1600-1700) From the sound
coo2 (1900-2000) Natural sound