The Romans called them "thorn hogs";
what do we call them?
Etymology, Etymology, and more Etymology
as well as grammar, usage, euphemism, slang, jargon, semantics, linguistics, neologism, idiom, cant, and argot.

The critically-acclaimed board game
MooT
consists of tough questions about the nuances of the English language.
Answer:
porcupines
The word porcupine derives from the Latin
porcus, hog and spina, thorn.
According to the Online Etymological
Dictionary, the word had many forms in Middle English and early Modern
English "including portepyn,
porkpen, porkenpick, porpoynt
, and Shakespeare's version, porpentine (in
'Hamlet')."
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