Definition - To show different forms of a verb (i.e. the different forms it takes when used in a different voice, mood, or tense, etc).

Example -
I am going. I was going. I will go. I will be going — etc.

Etymology -
The term derives from the Latin conjugare, to join together (from con, together + jugare, yoke or join).

Oxford English Dictionary -
Its first citation in this sense is from 1530:
"In the seconde boke, where I conjugate je parle and je conuertis at the length."
(Jehan Palsgrave, Lesclarcissement de la langue françoyse, Introd. 33 )

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