paramour
‘a lover, especially one in an adulterous relationship’
Lexical development traced from the Tamil root:
E. paramoire, paramowris, peramoure, paramoure < A.Fr., O.F. par amour ‘love’ < amor 'love' < amare ‘to love’ < Proto-Ital. ama- ‘to take, hold’ < uhmaw < Tamil amar