from 138; properly, a choice, i.e. (specially) a party or (abstractly) disunion:

KJV-- heresy [which is the Greek word itself], sect.

138 haireomai (hahee-reh'-om-ahee);

to take for oneself, i.e. to prefer:

KJV-- choose. Some of the forms are borrowed from a cognate hellomai (hel'-lom-ahee); which is otherwise obsolete.