ἑτεροζυγέω/heterozugeō

This word describes a situation or how something is. It is a verb. However, it is not an action.

This word can describe two animals who are unequally yoked. This is when two animals have a wooden yoke on them to drag a piece of equipment. When they are unequally yoked, these animals do not do the same amount of work.
This word can describe people who are in some way like animals that are unequally yoked.

See: 2 Corinthians 6:14