catalysis
‘regulation of a chemical reaction by the presence of a catalyst, dissolution’
Lexical development traced from the Tamil root:
Gk. katalysis ‘dissolution, a dissolving’ (of governments, military units, etc.) < katalyein ‘to dissolve’ < kata ‘down’ + Gk. lysis ‘a loosening’ < lyein ‘to loosen’ < luh < leu- < Tamil aṟuttal