A root appearing in notes on the Words, Phrase, and Passages from the Lord of the Rings with two variants √KHOL and √SKOL and the gloss “shut, close”; it served as the basis for S. Fen Hollen “Shut Door” (PE17/98). The roots were followed by a series of unglossed Quenya forms all beginning with hol-.
Neo-Eldarin: The note where it appeared does not provide enough information to determine whether this root was √KHOL or √SKOL, but elsewhere √KHOL appeared with the gloss “crow, cry aloud” (PE21/82), so for purposes of Neo-Eldarin I think it’s better to assume this root was √SKOL “shut, close”.
A root appearing in Common Eldarin: Noun Structure from the early 1950s with the gloss “crow, cry aloud”, serving as the basis for primitive words for male and female chickens (PE21/82). It may be a later iteration of the early root ᴱ√HO(HO) “shout, scream” from the Qenya Lexicon of the 1910s (QL/40), a primitive form that was mentioned again as ᴹ✶hō- “shout” in the Declension of Nouns from the early 1930s (PE21/39).