Usage examples for Qua:
- He therefore determined to look out for some steady naval lieutenant, and make it a sine qua non that our hero should be accompanied by him, and that he should go out as sailing- master. - "Mr. Midshipman Easy", Captain Frederick Marryat.
- The postman can open a letter if he likes and know all about the message he is conveying, but, if he does this, he is diseased qua postman. - "The Note-Books of Samuel Butler", Samuel Butler.