IPA: /ˈtraɪstər/
KK: /ˈtraɪstər/
A person who secretly meets another person for a romantic relationship.
She was known as a tryster, meeting her lover in secret.
The word 'tryster' originates from Middle English 'trysten', meaning to make an appointment or to meet. It is derived from the Old French 'triste', meaning a place where one waits or a meeting place. The word 'tryster' refers to someone who meets or has an appointment with another.
Think of someone who is at a 'meeting place' ('triste') waiting to meet someone else — that's what a tryster does.