The story
- Old English · inherited fromunsǣliġ
- Middle English · inherited fromunsely
- English todayunsilly
From Middle English unsely, from Old English unsǣliġ, equivalent to un- + silly. Doublet of Unseelie.
Words from the same roots
Middle Englishunsely all →
unseelie
Old Englishunsǣliġ all →
unseelie
Etymology from Wiktionary, CC BY-SA 4.0.