unintermittingly
advEtymology From un- + intermittingly.
1
Without intermissions; uninterruptedly.
- I began a scream that lasted unintermittingly the whole time of the incision – and I almost marvel that it rings not in my Ears still! so excruciating was the agony.1812, Frances Burney, Journals and Letters, Penguin, published 2001, page 442: