Alternative spelling of single-handedly. (adjective)
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Use "singlehandedly" in a sentence
"I think that learners have every right to and are right to erect those walls and maintain those those walls in many school cultures and no Robin Williams dead poets society character romantically and singlehandedly is going to or should change that on their own."
"The call singlehandedly stopped Detroit Tigers pitcher Armando Galarraga from retiring all 27 batters he faced without giving up a walk or a hit: a perfect game."
"Direct homage or eerily similar, it’s a great scene and it probably singlehandedly is responsible for the film’s PG-13 rating."