disarm
‘deprive of power to injure or terrify, render harmless’
Lexical development traced from the Tamil root:
E. desarme, dysarme, disarme < O.F. desarmer < des- ‘reverse of’ + armer ‘to arm’ < O.F. armes ‘arms, weapons, war, warfare’ < Lat. arma ‘weapons, tools, implements (of war)’ < aam < ar(ə)mo- < ar- < Tamil ār