inkilyadv.

/ˈɪŋkɪli/Etymology: < inky adj. + -ly suffix2.
the world > matter > colour > named colours > black or blackness > [adverb] > as ink
1894 R. L. Stevenson & L. Osbourne i. vi. 111 The sea.., inkily blue.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).