We found one dictionary that defines the word tetterish:

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1. tetterish: Wiktionary

Definitions from Wiktionary (tetterish) ▸ adjective:  Synonym of tettery ▸ Words similar to tetterish ▸ Usage examples for tetterish ▸ Idioms related to tetterish ▸ Wikipedia articles (New!) ▸ Popular nouns described by tetterish ▸ Words that often appear near tetterish ▸ Rhymes of tetterish ▸ Invented words related to tetterish