Origin: Latin suffix -ary
Intermediary has 3 different meanings across 1 category:
a negotiator who acts as a link between parties
"The diplomat served as an intermediary to help the two warring nations reach a peace agreement without direct contact."
An agent acting as a mediator between sides to facilitate agreement or cooperation.
"The company hired an independent intermediary to negotiate a peace deal between the two rival unions."
Intermediate.
"The software update failed because it was stuck on an intermediary stage of installation, requiring a manual restart to complete the process."