(~s, catalysing, ~d)
Note: in AM, use 'catalyze'
1.
If something ~s a thing or a situation, it makes it active. (FORMAL)
Any unexpected circumstance that arises may catalyze a sudden escalation of violence.
VERB: V n
2.
In chemistry, if something ~s a reaction or event, it causes it to happen. (TECHNICAL)
The wires do not have a large enough surface to ~ a big explosion.
VERB: V n