Adverb
without assistance
Source: WordNetA war can perhaps be won single-handedly. But peace - lasting peace - cannot be secured without the support of all. Luiz Inácio Lula da Silva
Then there is the man with a conscience, who fights single-handedly against heavy odds in situations that call for a decision. Dietrich Bonhoeffer
...the news might be single-handedly trying to bring about an environmental catastrophe, which it will then report on. Charlie Brooker
Nobody has single-handedly done more for the US image than me... Bobby Fischer
Not a fan of spiders. I saw the movie 'Arachnophobia,' which was single-handedly rated in the top three worst choices of my life. Chris Pine
For a while, even in the house of good friends for dinner or for cocktails, they would really be upset. They thought I had single-handedly destroyed the best phone service in the world. Harold H. Greene