The name Idril is the Sindarin form of her Quenya name Itarildë (or Itarillë), which means "Sparkling Brilliance".[source?] She was called Celebrindal, "Silver-foot", because she always went barefoot.
Quenya
melda
beloved, dear, sweet
Idril
Idril
melda adj. "beloved, dear, sweet" (MEL, VT45:34), superlative arimelda *"dearest" (PE17:56, see ar- #2), meldielto "they are beloved" (sc. meld[a]-ië-lto "beloved-are-they" however, both the stative verb ending -ië "is/are" and the ending -lto "they" may be obsolete in LotR-style Quenya) (FS) PE17:55 gives the comparative form as arimelda or ammelda and the superlative as eremelda, anamelda or once again ammelda (PE17:55).