Table 2.

Verbs for causal relations

S. No	Verb categories	Verbs
1	decreases	reduce, decrease, suppress, block, down-regulate, decrease, down-regulation, inhibit
2	increases	increase, induce, activate, enhance, up-regulate, up-regulation
3	directlyIncreases	increase verbs preceded by an adjective “directly”
4	directlyDecreases	decrease verbs preceded by an adjective “directly”