The Sindarin word for “mist”, an element in many names, derived from the root √KHITH of the same meaning (SA/hîth; PE17/73).
Conceptual Development: N. hîth “mist” appeared in The Etymologies of the 1930s, already with the derivation given above (Ety/KHIS), though when Tolkien first defined the word, he first wrote (and then deleted) the gloss “fog” (EtyAC/KHIS). In The Etymologies as published in The Lost Road, Christopher Tolkien wrote hith (LR/364), but Carl Hostetter and Patrick Wynne confirmed that the actual form was hîth in their Addenda and Corrigenda to the Etymologies (VT45/22).
adj. grey, light grey. >> Mithrandir, mithril