augmentative
‘having power or quality of augmenting’
Lexical development traced from the Tamil root:
E. augmentatif, augmentatyf, augmentatiue < O.F. augmentatif < La.Lat. augmentare ‘to increase’ < Lat. augmentum ‘an increase, growth’ < augere ‘to increase, make big, enlarge, enrich’ < awg < aug- < Tamil ākutal