EXAMPLES FROM THE WEB FOR UNLESS
"Unless it should be his gracious pleasure to dispense with obedience," replied Artaphernes.
But unless he did something a hundred lives perhaps might be lost.
Unless you do as I bid you, I will keep you in irons for the rest of the voyage!
"That'll be enough for us, unless you are very hungry," said Robert.
Unless we are fortunate enough to find some, retreat is inevitable.
What opening for extrication, unless, indeed, Emilia should die?
The mails, unless repelled, will continue to be furnished in all parts of the Union.
Must have been a coyote in here that sneaked off with your trousers, unless you have 'em on.
Unless we in America work to preserve the peace, there will be no peace.
Unless we in America work to preserve freedom, there will be no freedom.
mid-15c., earlier onlesse, from on lesse (than) "on a less condition (than)," the first syllable originally on, but the negative connotation and the lack of stress changed it to un-.