" stimulatory "

[Verb]  | "stim*u*late" | \ ˈstim-yə-ˌlāt \

1: to excite to activity or growth or to greater activity : animate, arouse

2: to function as a physiological stimulus to

3: to arouse or affect by a stimulant (such as a drug)

Origin: 1566 ;

 Latin stimulatus, past participle of stimulare, from stimulus goad; perhaps akin to Latin stilus stem, stylus {mat|style|};

[Adjective]  | "self-stim*u*la*to*ry" | \ ˌself-ˈstim-yə-lə-ˌtȯr-ē \

1: of, relating to, or involving the stimulation of oneself

Origin: 1965 ;

[Adjective]  | "stimulatory" 

[Verb]  | "stimulate"