Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
...
Proto-Indo-European *péth₂r̥

→ English pen (derived)
→ English feather (inherited)
→ Old English feþer (derived)
→ Breton evn (inherited)
→ Welsh adar (inherited)
→ Welsh edn (inherited)
→ German Feder (derived)
→ Lower Sorbian pjero (inherited)
→ Greek φτερό (derived)
→ Middle English feþer (derived)
→ Middle English penne (derived)
→ Spanish peña (inherited)
→ Faroese fjøður (derived)
→ Faroese pennur (derived)
→ French penne (inherited)
→ West Frisian fear (inherited)
→ Galician pena (inherited)
→ Old High German fedara (inherited)
→ Ancient Greek πτερόν (derived)
→ Indonesian per (derived)
→ Indonesian pena (derived)
→ Icelandic fjöður (derived)
→ Italian penna (inherited)
→ Cornish edhen (inherited)
→ Latin accipiter (mention)
→ Latin penna (derived)
→ Latin pinna (derived)
→ Norwegian Bokmål fjær (derived)
→ Norwegian Bokmål fjør (derived)
→ German Low German Fedder (inherited)
→ Dutch veer (derived)
→ Dutch veder (derived)
→ Norwegian Nynorsk fjør (inherited)
→ Old Norse fjǫðr (derived)
→ Pennsylvania German Fedder (inherited)
→ Polish pióro (mention)
→ Portuguese pena (inherited)
→ Romanian pană (inherited)
→ Swedish fjäder (inherited)
→ Old Armenian փետուր (cognate)