thornilyadv.

/ˈθɔːnɪli/Etymology: < thorny adj. + -ly suffix2.
the world > plants > part of plant > thorn or prickle > [adverb] > in a thorny or spiny manner
1886 R. D. Blackmore Springhaven xv, in July 268/1 Thornily crested with good stout furze.
This entry has not yet been fully updated (first published 1912; most recently modified version published online June 2018).