One who able to use the right and left hands equally well:
A
Sinister
B
Ambidextrous
C
Ambivalent
D
Amateur
Correct Answer: Ambidextrous
The one word substitution is Ambidextrous.Sinister : One who able to use the left hand well.
Ambivalent : having mixed feelings or contradictory ideas about something or someone.
Amateur : a person who is contemptibly inept at a particular activity.
Ambidextrous : able to use the right and left hands equally well.