Definition
to seven oneself, i.e. swear (as if by repeating a declaration seven times)
Derivation
a primitive root; properly to be complete, but used only as a denominative from H7651 (שֶׁבַע);
King James Version Usage
adjure, charge (by an oath, with an oath), feed to the full (by mistake for H7646 (שָׂבַע)), take an oath, [idiom] straitly, (cause to, make to) swear.