Where does “geekful” come from?

geekful (English) comes from English geek, from English geck, from Dutch gek, from Middle Dutch geck — madman.

Ancestry of “geekful”, step by step

geekful traces back through two separate lines of ancestry.

via English geek

StepLanguageWordMeaning
1EnglishgeekA carnival performer specializing in bizarre and...
2Englishgeckscorn; derision; contempt; Fool; idiot; imbecile;...
3Dutchgekcrazy, mad; ludicrous, farcical; silly, playful
4Middle Dutchgeckmadman

via English ful

StepLanguageWordMeaning
1Englishful
Every word from Middle Dutch geck