Latin Late From  Skillful  One Etymology Sense Medieval

am·bi·dex·ter
I. \|ambə|dekstə(r), |aam-\ noun
(-s)
Etymology: in sense 1, from Middle English, from Medieval Latin, from ambidexter, adjective, from Late Latin, skillful with both hands; in sense 2, from Late Latin, from ambidexter, adjective
1. 
 a. : one that takes bribes or fees from both sides
 b. archaic : one that practices duplicity
2. obsolete : one that uses both hands with equal facility
II. adjective
Etymology: Medieval Latin & Late Latin; Medieval Latin, double-dealing, from Late Latin, skillful with both hands (translation of Greek amphoterodexios), from ambi- + dexter on the right, skillful — more at 
archaic :