The name of the Númerórean ship that was the first to return to Middle-earth, six centuries after Númenor was settled (UT/171). It is the noun entulessë “return” used as a name.
Quenya
entulessë
noun. return
entulessë
proper name. Return
entulessë
return
entulessë noun "return" (UT:171)
nanwen-
return
nanwen- vb. "return" (go/come back) (PE17:166). The etymological form nan-men- indicates that the second element is #men- "go", changed to -wen- following nan- "back"; hence the perfect should perhaps be *naneménië.
A noun for “return” attested as the name of a ship: Entulessë (UT/171). It seems to be an abstract noun based on the verb entul- “return, come again”.