我的愚见是honk/honking
因为horn指的是车的喇叭 你说的是车喇叭发出的声音．我觉得应该是honk/honking
我适才刚巧碰到这一段话
So there we were,pedaling our four bicycles madly,soaking up sunshine and exhaust fumes as we crossed busy Stevens Creek Boulevard.
"HOONNNN-
NNNNK," blared the horn on a utility vehicle.
"Thanks for supporting us!" I yelled cheerily at the driver.
"Get out of the way!" he screamed back.