Where does “crackpot” come from?

I notice there's a significant problem with this chain: it doesn't support the etymology of "crackpot" at all. The chain shows: - English pot → Middle English pot → Old English cracian → PIE gerh₂- → Latin possum This sequence doesn't actually lead to "crackpot," and the steps don't connect logically (Old English "cracian" to PIE "gerh₂-" to Latin "possum" is broken). Additionally, the meaning of "crackpot" (an eccentric or crazy person) isn't explained by these etymons. I cannot write an accurate one-sentence etymology summary because the provided chain doesn't support the word "crackpot." Could you provide: 1. Clarification on whether "crackpot" or "pot" is the headword? 2. A corrected etymological chain? 3. The

crackpot (English): An eccentric, crazy or foolish person. A "kook";...

Definitions

  1. An eccentric, crazy or foolish person. A "kook";...

Ancestry of “crackpot”, step by step

crackpot traces back through two separate lines of ancestry.

via English pot

StepLanguageWordMeaning
1EnglishpotA flat-bottomed vessel used for cooking food;...
2Middle EnglishpotA pot; a circular receptacle or vessel; The top...
3Old Frenchpotpot; third-person singular present indicative of...
4Vulgar Latinpottum
5Frankish*pott
6Proto-Germanicputtazpot, jar, tub
7Proto-Indo-Europeanbudn-a kind of vessel; type of vessel; a type of...

via English crack

StepLanguageWordMeaning
1EnglishcrackTo form cracks; To break apart under pressure; To...
2Middle Englishcrakloud conversation, bragging talk
3Old Norsekrákacrow
4Proto-Germanic*krakǭ
5Proto-Germanickrakōnąto crack; crackle; shriek
6Proto-Indo-Europeanǵerh₂-to grow old, to mature

Words derived from “crackpot

Every word from Proto-Indo-European budn-