arithmetic
‘art of computation, the most elementary branch of mathematics’
Lexical development traced from the Tamil root:
E. arsmetike, arsmetique, arsmatryk, arithmetike, arithmetique < O.F. arsmetique < Lat. arithmetica < Gk. arithmeticē ‘counting art’ < arithmetikos ‘of or for reckoning, arithmetical’ < arithmos ‘number, counting, amount’ < uhr < erei-dhmo- < re- < Tamil ār