single–handedly

without aid or support the team's star slugger hit three home runs, effectively winning the game single-handedly Synonyms independently, single-handed, single-handedly, singly, solely, unaided, unassistedRelated Words individually, separately; soloNear Antonyms collectively, conjointly, cooperatively, hand in glove (or hand and glove), hand in hand, jointly, mutually, together; en masse