Where does “flaggish” come from?

flaggish (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.

Ancestry of “flaggish”, step by step

flaggish 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 ish

StepLanguageWordMeaning
1EnglishishPronunciation spelling of is; somewhat,...
2English-ishTypical of, similar to, being like; Somewhat,...
3Middle English-ishAlternative form of -yssh
4Old English-isċ-ish
5Proto-West Germanic-iskCreates adjectives from nouns
6Proto-Germanic-iskazForms adjectives from nouns with the sense of...
7Proto-Indo-European-iskosCharacteristic of, typical of, pertaining to
Every word from Proto-Indo-European pelə-Every word from Proto-Indo-European plāg-Every word from Proto-Germanic flakuraz