संस्‍कृतशब्‍दकोशः

पिष्टपेषण

वृथा आवृत्ति

to grind what is already ground, repetition

Monier–Williams

पिष्टपेषण — {peṣaṇa} n. id##{-nyāya} m. the rule of grinding flour ({yena}, on the principle of 'grinding the ground' i.e. labouring uselessly) ĀpGṛ. Sch