bigamously
He married polygamously and encouraged his closest companions to take other wives too.
She wanted to divorce him after he called her ugly and said he would marry a beautiful woman polygamously.
Her polygamously married mother was not allowed into the country.

SMART Vocabulary: related words and phrases

Marriage, cohabitation & other relationships
adulteress
affinal
as husband and wifeidiom
be an itemidiom
be shacked upidiom
have an affair
have something going with someoneidiom
hear wedding bellsidiom
hitched
honest
matrimonially
matrimony
monogamist
monogamous
ménage à trois
shack
shack up
situationship
something
together