charabanc
‘a large bus, typically used for sight-seeing’
Lexical development traced from the Tamil root:
E. char-a-banc, charaban, char-à-banc < F. char-à-bancs ‘benched carriage’ < char ‘wagon’ < Lat. carrum, carrus ‘two-wheeled Celtic war chariot’ < Gaul. karros + à ‘to’ + banc ‘bench’ < krsos < sharr < kers- < Tamil kaṭu