The suffix is – tion.

The prefix is – con.

Main Entry: 1con·ju·gate

Pronunciation: \ˈkän-ji-gət, -jə-ˌgāt\

Function: adjective

Etymology: Middle English conjugat, from Latin conjugatus, past participle of conjugare to unite, from com- + jugare to join, from jugum yoke — more at yoke

Date: 15th century

1 a: joined together especially in pairs : coupled b: acting or operating as if joined

2 a: having features in common but opposite or inverse in some particular b: relating to or being conjugate complex numbers

3of an acid or base : related by the difference of a proton

4: having the same derivation and therefore usually some likeness in meaning

5of two leaves of a book : forming a single piece

— con·ju·gate·ly adverb

— con·ju·gate·ness noun

prefix=con

sufix=tion

sorry about the root word