Sworn
Part of speech: adjective
Definition: Given under oath.
Part of speech: verb
Definition: To take an oath, to promise.
Example sentence: The world is not dialectical - it is sworn to extremes, not to equilibrium, sworn to radical antagonism, not to reconciliation or synthesis. This is also the principle of evil.
Pledged
Part of speech: verb
Definition: To make a solemn promise (to do something).