: to appeal to as an authority or for support <She invoked the Sunday rule as soon as he returned from the skateboard park and a family outing was launched. — Carl Hiaasen, Hoot>
Word Root of INVOKE
The Latin word vox, meaning “voice,” and the related word vocāre, meaning “to call”, give us the root voc or vok. Words from the Latin vox or vocāre have something to do with the voice or with calling. Anything vocal is produced by the voice. A vocation is the work that someone is called to do as a job. To evoke is to call forth. To invoke is to call on for aid or protection. To provoke is to call forth another's anger. The word voice also has vox as its root.