IPA: //ˈpoʊstˈmɑːrɪtəl//
KK: /ˈpoʊstˈmɑːrɪtəl/
Relating to the period or events that occur after a marriage has taken place.
They attended a postmarital counseling session to strengthen their relationship.
Postmarital → It is formed from "post-" (meaning after) and "marital" (from Latin "maritalis", meaning of marriage). The word "postmarital" refers to the period or circumstances that occur after marriage.
Think of 'post-' meaning 'after' and 'marital' relating to 'marriage' — so postmarital refers to anything that happens after marriage.
No commonly confused words.