IPA: //ˈkaʊˌpʌn.tʃər//
KK: /ˈkaʊˌpʌn.tʃər/
A person who works on a ranch, especially one who tends cattle and performs various tasks related to herding and managing livestock.
The cowpuncher rode out at dawn to check on the cattle.
Cowpuncher → The word is formed from 'cow' (from Old English 'cu', meaning a domesticated bovine animal) and 'puncher' (from the verb 'punch', meaning to hit or strike, with the suffix '-er' indicating a person who performs the action). A cowpuncher is thus a person who strikes or handles cows, typically referring to a cowboy or cattle herder.
Think of someone who 'handles' ('puncher') cows — that's why a cowpuncher is a person who works with cattle.