ᴹ√AK root. “narrow, confined”
A root in The Etymologies of the 1930s glossed “narrow, confined”, with the derived adjectives ᴹQ. arka and N. agor of similar meaning. It was the basis of the name Aglon meaning “Narrow Pass”, which continued to appear in Silmarillion narratives of the 1950s and 60s (WJ/38, 77). It might also be a factor in the later root √AKAS “neck, ridge” from the 1960s (PE17/92).
Reference ✧ Ety/AK ✧ “narrow, confined”