baleen

The story

1. Ancient Greek · derived fromφάλαινα“whale”
2. Latin · derived frombalaena“whale”
3. Old French · derived frombaleine“whale, whalebone”
4. Middle English · inherited frombaleyne
5. English todaybaleen

From Middle English baleyne, from Old French baleine (“whale, whalebone”), from Latin balaena (“whale”), from Ancient Greek φάλαινα (phálaina, “whale”).