IPA: /æmˈbɪdɛkstrəsli/
KK: /æmˌbɪˈdɛkstrəslɪ/
In a way that shows the ability to use both hands equally well.
She can write ambidextrously, using both hands with equal skill.
Ambidextrously → It is formed from "ambi-" (meaning both) and "dexter" (from Latin, meaning right or skilled). The suffix "-ously" indicates a manner of doing something. Thus, "ambidextrously" means in a manner that is skilled with both hands.
Think of 'ambi-' meaning both and 'dexter' meaning skilled or right-handed. This helps you remember that ambidextrously refers to being skilled with both hands.