Definition of swore:
(v) :
(ambitransitive) To use offensive, profane, or obscene language.
(v) :
(transitive) To promise intensely that something is true; to strongly assert.
(v) :
(ambitransitive) To take an oath, to promise intensely, solemnly, and/or with legally binding effect.
(v) :
(transitive) To take an oath that an assertion is true.
(v) :
(transitive) To administer an oath to (a person).
(n) :
A swear word.