Mid 16th century (in an earlier sense). From Anglo-Norman accouplir, accupler, Anglo-Norman and Middle French acopler, acoupler, accoupler to join (two things, people, or animals) to one another from a- + cupler, copler, coupler.
Definition of accouple in US English:
accouple
verbəˈkʌpl
rare
with objectTo join (one thing) to another.
Origin
Mid 16th century (in an earlier sense). From Anglo-Norman accouplir, accupler, Anglo-Norman and Middle French acopler, acoupler, accoupler to join (two things, people, or animals) to one another from a- + cupler, copler, coupler.