bigamize
/ˈbɪɡəmaɪz/Definitions
1. verb
to marry or cohabit with two spouses simultaneously, often in secret; to engage in bigamy
“The scandal erupted when the politician’s wife discovered that he had bigamized and was living with another woman.”
2. verb
to have two spouses or partners at the same time, often in a secret or illicit relationship
“The couple’s marriage was annulled after it was discovered that one of the partners had bigamized and was still married to someone else.”