Having only one hand.
Performed using only one hand.
Designed for use with one hand
That uses one hand.
Involving the actions of only one person.
Chiral, having an asymmetric structural orientation.
Using only one hand.
She waved to us and lost her balance; riding a bicycle one-handed is tricky.
Very easily, without effort.
He's a terrible snooker player. I could beat him one-handed!