The story
- Old English · inherited fromfulnes
- Middle English · inherited fromfulnesse
- English todayfullness
From Middle English fulnesse, from Old English fulnes, fylnes, fyllnis (“completeness; abundance”), equivalent to full + -ness. Cognate with Old High German folnissi (“fullness”).
Words from the same roots
Old Englishfulnes all →
foulness
Etymology from Wiktionary, CC BY-SA 4.0.