ᴹ√RAW root. “*roar”
Tolkien used similar Elvish words for “lion” for much of his life. Lion words were connected to a pair of related roots in the Qenya Lexicon of the 1910s: ᴱ√RAVA or ᴱ√RAẆA (QL/79). The first of these had derivatives like ᴱQ. rauna “prey” and ᴱQ. rauta- “chase, hunt, pursue” as well as ᴱQ. rau “lion”. The second had derivatives like ᴱQ. rauka “swift” and ᴱQ. rawa- “run, chase”. In the contemporaneous Gnomish Lexicon, words like G. raug “rushing, swift” were probably derived from ᴱ√RAẆA and words like G. rau “lion” and G. raust “hunt, chase” were probably derived from ᴱ√RAVA (GL/65).
In The Etymologies of the 1930s Tolkien gave only the root ᴹ√RAW (unglossed) with derivatives like ᴹQ. rá/N. rhaw “lion” (Ety/RAW). Hints of this root are also seen in later words like S. Rauros “Roaring Spray” (RC/327) and Q. rávë “roaring noise” (MC/223), indicating that the root meaning might be “*roar”. As for “lion”, in the Outline of Phonology of the early 1950s (OP2) Tolkien gave two distinct primitive forms: ✶rāw “lion” and ✶raurō “roarer” (PE19/99, 102, 104).
Reference ✧ Ety/RAW
ᴱ√RAVA root. “*hunt”
References ✧ LT1A/Meássë; QL/34, 79
ᴱ√RAẆA root. “*rush, run, chase”
References ✧ QL/34, 79