IPA: /ˈtʃɜːr.lɪʃ.li/
KK: /ˈtʃɜr.lɪʃ.li/
In a rude or surly way, showing a lack of civility or politeness.
He churlishly refused to help his neighbor with the project.
Churlishly → It is formed from "churl" (from Old English "ceorl", meaning a peasant or a rude person) and "-ishly" (meaning in a manner of). The word "churlishly" means in a manner that is rude or surly, characteristic of a churl.
Think of a 'churl' as someone who is rude or surly, and remember that 'churlishly' describes behaving in that rude manner.