shadowilyadv.
/ˈʃadəʊɪli/ In a shadowy manner, like a shadow.
ΘΚΠ
the world > matter > light > darkness or absence of light > intercepting or cutting off of light > [adverb] > like a shadow
shadowily1845
shadowly1866
1845 ‘E. Warburton’ Crescent & Cross I. 336 Numerous torches here gleamed upon walls, shadowily giving out pictured battles, and kneeling priests, and stern deities.
1890 Chambers's Jrnl. 1 Mar. 133/1 The sailors..went staggering shadowily under their burden along the poop.
This entry has not yet been fully updated (first published 1913; most recently modified version published online March 2018).
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adv.1845