Ruffianly-Looking

In this gothic Sheridan Le Fanu novel I have been reading, our heroine is nearly snatched by two "ruffianly-looking" men who call themselves Lord Lollipop and Sir Simon Sugarstick. IT'S TERRIFYING. Also I did not know that "ruffian" had an adverbial form. But it does! You can be old like me and still learn exciting new things you should have already known. It's terrifying.