Where does “tonguy” come from?

tonguy (English) comes from English tongue, from Middle English tung, from Old English tung, from Proto-West Germanic tungā, from Proto-Germanic tungǭ, from Proto-Indo-European dn̥ǵʰwéh₂s — tongue.

Ancestry of “tonguy”, step by step

tonguy traces back through two separate lines of ancestry.

via English tongue

StepLanguageWordMeaning
1EnglishtongueThe flexible muscular organ in the mouth that is...
2Middle Englishtungtongue; A tongue-shaped thing; language, speech,...
3Old Englishtung
4Proto-West Germanictungātongue; speech, language
5Proto-Germanictungǭtongue; speech, language
6Proto-Indo-Europeandn̥ǵʰwéh₂stongue

via Middle English tungy

StepLanguageWordMeaning
1Middle Englishtungy
Every word from Proto-Indo-European dn̥ǵʰwéh₂sEvery word from Proto-Germanic tungǭEvery word from Proto-West Germanic tungā