Possibly a transitive verb. So infrequently used though it's function is
neither here nor there.
1: The catalyst
responsible for a deterring or discouraging outcome.
2: A string of letters which appear to form a word with meaning but upon closer
inspection mean jack-shit.
The risk of contracting Creutzfeldt–Jakob disease failed to disincentivize anybody,
quite the opposite, sales of the 'Rough Rodeo' condom
went up.