The story
- Proto-Indo-European · inherited from*h₃dóntes
- Proto-Germanic · inherited from*tanþiz
- Old English · inherited fromtēþ
- Middle English · inherited fromteth
- English todayteeth
From Middle English teth, plural of tothe, from Old English tēþ, nominative plural of tōþ, from earlier *tœ̄þ, from Proto-Germanic *tanþiz, nominative plural of *tanþs, from Proto-Indo-European *h₃dóntes, nominative plural of *h₃dónts.
Etymology from Wiktionary, CC BY-SA 4.0.