single-handedly
1. [ adverb ] without assistance
Synonyms: single-handed
Examples:

"I built this house single-handedly"

Similar spelling:   single-handed
  single-mindedly
  single-stranded
  single-minded
  single-bedded
  single-channel
  single-spaced
  single-celled
  single-mindedness
  single-shelled
  single-barreled
  single-barrelled
  single-breasted