kẹ̀kẹ̀ noun /kɛ̀.kɛ̀/
Definitions
  1. splitting wide open
  2. running in a spread out posture
Source: Wiktionary · etymology 6, where this word is spelled “kẹkẹ”. Reference: en-kẹkẹ-yo-noun-v6eNtvhh