àtẹ̀gùn noun /à.tɛ̀.ɡũ̀/
Definitions
  1. the act of stepping on something to climb literally
  2. staircase, stairway, ladder
Etymology
From à- (“nominalizing prefix”) + tẹ̀ (“to step”) + gùn (“to climb”)
Component words
à-nominalizing prefixtẹ̀to stepgùnto climb
Source: Wiktionary · etymology 2, where this word is spelled “atẹgun”. Reference: en-atẹgun-yo-noun-k1PBZ8mG