to swear more than or more strongly than

If someone swears , they use language that is considered to be rude or offensive , usually because they are angry .

If you swear by something, you believe that it can be relied on to have a particular effect .

When someone is sworn in , they formally promise to fulfil the duties of a new job or appointment .

to promise to abstain from (something)

to secure the issue of (a warrant for an arrest ) by making a charge under oath