from the Proto-Indo-European prefix *ambhi- "both (sides)," of which the Greek equivalent is amphi-, which we see in "amphibian" and "amphitheater."
snkt. ubha = har do

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(har-)do- (con ambigu : do-pahlu, ambidextre : har-do-dast)

The following video provides you with the correct English pronunciation of the word "ambi-", to help you become a better English speaker.