IPA: /ˈhɔːs.flaɪ/
KK: /ˈhɔrsˌflaɪ/
A type of large fly that belongs to the family Tabanidae, known for the females that feed on the blood of animals.
The horsefly buzzed around the picnic, looking for a chance to bite.
Horsefly is formed from "horse" (from Old English *hors*, meaning a large domesticated animal) and "fly" (from Old English *flēoge*, meaning a flying insect). The word refers to a type of large fly that is often found around horses and other livestock.
Think of a large insect that is often found around 'horses' — that's why it's called a horsefly.