Where does “flagtail” come from?

flagtail (English) comes from English flag, from English flack, from Middle English flacken, from German flackern, from Middle High German vlackern, from Proto-Germanic flakuraz, from Proto-Indo-European plāg-, from Proto-Indo-European pelə- — to wander; to fill.

flagtail (English): A group of perciform fish, the Kuhlia genus,...

Definitions

  1. A group of perciform fish, the Kuhlia genus,...

Ancestry of “flagtail”, step by step

flagtail traces back through two separate lines of ancestry.

via English flag

StepLanguageWordMeaning
1EnglishflagA piece of cloth, often decorated with an emblem,...
2EnglishflackTo flutter; palpitate; To hang loosely; flag; To...
3Middle Englishflackento palpitate, flutter; to move to and fro,...
4Germanflackernto flicker
5Middle High Germanvlackern
6Proto-Germanicflakurazshaking, wavering
7Proto-Indo-Europeanplāg-
8Proto-Indo-Europeanpelə-to wander; to fill

via English Tail

StepLanguageWordMeaning
1EnglishTailA Chinese constellation coinciding with the tail of Scorpius, one of the 28 lunar mansions and the tail of Azure Dragon
2Middle EnglishtaylA tail; The back side or reverse of a creature; A...
3Old Englishtæġltail
4Proto-Germanictagląhair; ponytail; hair of a tail; tail
5Proto-Indo-Europeandoḱ-hair of the tail
6Proto-Indo-Europeandeḱ-take; perceive
Every word from Proto-Indo-European pelə-