The word apaskara is formed by suṭ meaning 'the part of a chariot'.,
This word is also derived from कृ with the proposition अप and the affix अप् 3.3.57 and सुट् augment. When not having this meaning, we have अपकरः ॥,
अपस्करो रथाङ्गम्
Adhyāya 6 · Pāda 1 · Rule 149