single-handedly
adverbUK /ˌsɪŋ.ɡəlˈhæn.dɪd.li/
US /ˌsɪŋ.ɡəlˈhæn.dɪd.li/
all by yourself, without help from anyone.
She single-handedly built the whole treehouse.
RELATED WORDS
OTHER MEANINGS
2. using only one hand.
He caught the ball single-handedly.
3. done by one person rather than a team.
The rescue was a single-handedly brave act.
4. without support from others in a difficult task.
She single-handedly kept the family business running.