The story
- Proto-Indo-European*pleth₂-?
- Proto-Indo-European*pel-?
- Proto-Indo-European*pleh₂-
- Proto-Indo-European*pl̥h₂nós
- Proto-Italic*plānos
- Latinplānus
- Italianpiano
- Proto-Indo-European*bʰerǵʰ-
- Proto-Indo-European*dʰer-?
- Proto-Indo-European*dʰerǵʰ-
- Proto-Italic*forktis
- Old Latinforctis
- Latinfortis
- Italianforte
- Italianpianoforte
- Englishpianoforteclip.
- Englishpiano
- English todaypianola
Etymology from Wiktionary, CC BY-SA 4.0.