the mind > goodness and badness > inferiority or baseness > foulness or filth > [adverb]
the mind > emotion > hatred > loathing or detestation > [adverb]
1489 (a1380) J. Barbour (Adv.) ix. l. 276 Quhen ye kingis cumpany Saw yat yai fled sa foulyly.
a1500 (c1425) Andrew of Wyntoun (Nero) vi. iii. l. 8 Fowllyly hym demenbryd þai.