ordinary
‘regular, customary, belonging to the usual order or course’
Lexical development traced from the Tamil root:
E. ordenarye, ordenarie, ordynarie < O.F. ordinarie ‘ordinary, usual’ < Lat. ordinarius ‘customary, regular, usual, orderly’ < ordo ‘row, rank, series, arrangement’ < Proto-Ital. ordn ‘row, order’ < awd < ar- < Tamil ār