The word 蹲下 is formed by combining the character 蹲, meaning 'to squat' and constructed with the radical 足 for leg-related action and the phonetic element 尊, with the character 下, meaning 'down'. This combination results in a compound where 蹲 conveys the squatting motion and 下 indicates the downward direction, together expressing the action 'to squat down'.