assay (n.)
‘an analysis to determine the quality or quantity of a substance’
Lexical development traced from the Tamil root:
E. asaie, assey(e), assai, asey < A.F. assai < La.Lat. exagium ‘a weighing’ < Lat. exigere ‘drive out; require, exact; examine, try, test’ < ex ‘out’ + agere ‘to set in motion, drive’ < uhs < ag- < Tamil ukai