Words similar to swear

Example sentences for: swear

How can you use “swear” in a sentence? Here are some example sentences to help you improve your vocabulary:

("Do not swear for the honor of Italy."
in the evening at the lit threshold whose intent was to swear return.
When will someone within earshot confuse swear by and swear at ?
I've never seen (or even heard) the words toxoman or morphinman , though I wouldn't swear that no Frenchman anywhere has ever used them.
Here's an idea: why not require these countries to swear off such weapons deals as a condition of receiving any IMF or U.S. bailout money?