Lefties

Ambidextrous: able to use both hands equally well
”I am ambidextrous.”
Ambi: both
Dextrous: having the ability to perform a difficult action quickly and skilfully with the hands

Cross-dominance: where a person favours one hand for some tasks and the other hand for others

Footedness: the dominance of one foot over the other
”I’m left-footed.” / “He’s right-footed.”