跫

Its parts

• 巩 gǒng to fix in place; to make firm and secure = 工 + 凡 sound
• 足 zú foot; leg = 口 + 龰 meaning

Other characters with 巩 as their sound:

恐 kǒng蛩 qióng銎 qiōng

Dictionaries file it under 足.