motivator

mo·ti·vate  (mt-vt)

tr.v. mo·ti·vat·ed, mo·ti·vat·ing, mo·ti·vates

To provide with an incentive; move to action; impel.

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moti·vator n.

Thesaurus

Noun

1.

motivator - a positive motivational influence incentive, inducement rational motive - a motive that can be defended by reasoning or logical argument dynamic, moral force - an efficient incentive; "they hoped it would act as a spiritual dynamic on all churches"