kọ̀ verb /kɔ̀/
Definitions
  1. to refuse, reject
    O kọ̀ láti kí àgbà yẹn You refused to greet the elder
Etymology
Cognates include Ifè kɔ̀
Source: Wiktionary · etymology 1, where this word is spelled “kọ”. Reference: en-kọ-yo-verb-gYxwiiH2