intercourse
‘commerce, connection by dealings, communication’
Lexical development traced from the Tamil root:
E. entercourse, entercours < O.F. entrecors ‘exchange, commerce, communication’ < Mod.F. entrecours < La.Lat. intercursus ‘a running between, intervention’ < intercurrere ‘to run between, intervene, mediate’ < Lat. inter ‘between’ + currere ‘to run’ < kaws < kers- < Tamil kaṭu