The story
- Proto-Indo-European*pótis
- Proto-Italic*potis
- Proto-Indo-European*h₁es-
- Proto-Indo-European*h₁ésti
- Proto-Indo-European*bʰuH-
- Proto-Indo-European*bʰúHt
- Proto-Italic*som
- Proto-Italic*possom
- Latinposse
- Vulgar Latinpotēre
- Old Frenchpooir
- Anglo-Normanpoer
- Middle Englishpower
- Englishpower
- Proto-Indo-European*bʰeg-
- Proto-Germanic*bankiz
- Proto-West Germanic*banki
- Lombardicbank
- Italianbanca
- Middle Frenchbanque
- Englishbank
- English todaypowerbank
From power + bank. First attested in the 1910s. Genericized trademark in the United Kingdom as PowerBank.
Etymology from Wiktionary, CC BY-SA 4.0.