The story
- Proto-Indo-European*úp
- Proto-Indo-European*upér
- Proto-Germanic*uber
- Old Englishofer-
- Middle Englishover-
- Proto-Indo-European*kʷelp-
- Proto-Germanic*kʷolpós
- Proto-Germanic*hwalbazder.?
- Proto-Indo-European*kʷelp-
- Proto-Germanic*kʷólpo-
- Proto-Germanic*hwalbąder.?
- Old Englishhwealf
- Old English*hwealfnian
- Old English*hwealmnian?
- Middle Englishwhelmen
- Middle Englishoverwhelmen
- Englishoverwhelm
- Englishoverwhelming
- English todayoverwhelmingness
From overwhelming + -ness.
Etymology from Wiktionary, CC BY-SA 4.0.