Qenya
tin-
verb. to glint
tinde
noun. glint
tindóme
noun. (starry) twilight, starlit dusk
sil-
verb. to shine
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
A noun in The Etymologies of the 1930s glossed “a glint” derived from the root ᴹ√TIN “sparkle, emit slender (silver pale) beams” (Ety/TIN).