Quenya 

nimulë

noun. phantom, (lit.) a seeming, phantom, *illusion, (lit.) a seeming

A word appearing as níma or nimule “phantom, (lit.) a seeming” in notes from 1957, that Tolkien specified was “an appearance having no existence in the physical world, existing only as a conception/memory/picture in one mind, and more or less accurately transferred direct to another” (NM/238). It was likely related to the root √NIM, a variant of √NEM “seem”.

Neo-Quenya: In a 2025-11-05 post to the Vinyë Lambengolmor Discord Server (VLDS), Luinyelle suggested it might also mean “illusion”.

níma

noun. phantom, (lit.) a seeming