Motivated to achieve something due to one's own interest.(adjective)
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Use "self-motivated" in a sentence
"Nobody needs him here, least of all Eli, who is in the dictionary next to the term "self-motivated"."
"Smart, self-motivated immigrants spur the innovations and create the jobs our economy needs to thrive."
"Not to say that those particular suggestions would make it easier for self-motivated people to obtain happiness, but rather merely outlining a set of systems to the individual isn't going to really enable them much at all."