Conjugate (verb)

1. To inflect a verb for tense, mood, person, and number.
2. To pair or match in a grammatical relationship, such as subject and verb.
3. To unite or join in marriage or a sexual relationship.

Origin:

From the latin conjugare, meaning "to join together", from com- "together" + jugare "to join".

Examples:

1. The conjugation of the verb "to be" is irregular in the English language.
2. The subject and verb must be conjugated to agree in number.
3. They have been conjugated for many years now.
4. The scientist conjugated the bacteria in order to study the results.
5. She said she would never conjugate with him.