Definition of sewellel in English:

sewellel

noun

another term for mountain beaver
‘The living rodent with the most archaic characters, most like the common ancestor of the Rodentia, is the sewellel or mountain beaver (which is not a true beaver at all) of the northwestern United States.’
another term for mountain beaver

Origin

Early 19th century from Chinook Jargon šwalál ‘robe of mountain-beaver skin’.

Pronunciation

sewellel

/sɪˈwɛləl/