The term 'sit on one's heels' is a phrase used to describe a particular posture. It can be achieved by hunkering (6 letters), squatting (5 letters) or scrunching (7 letters). Hunkering is when someone crouches down with their arms and legs close to their body. Squatting is when someone bends their knees and lowers their body while keeping their back straight. Scrunching is when someone sits with their legs bent and their feet tucked under their body. All three of these postures are used to achieve the same position, which is sitting on one's heels.