Slithy

A French translation that uses 'lubricilleux' for 'slithy', evokes French words like 'lubrifier' (to lubricate) to give an impression of a meaning similar to that of Carroll's word.

In his exploration of the translation challenge, Hofstadter asks "what if a word does exist, but it is very intellectual-sounding and Latinate ('lubricilleux'), rather than earthy and Anglo-Saxon ('slithy')?

The original in MischMasch notes that 'slithy' means "smooth and active" The i is long, as in writhe.