A noun appearing as ᴱQ. orosta “ascension” in the Qenya Lexicon and Poetic and Mythological Words of Eldarissa of the 1910s, based on the early root ᴱ√ORO¹ (QL/70). The Qenya Lexicon also had an unaugmented variant rosta under the root ᴱ√RŌ (QL/80). Early Noldorin word lists of the 1920s instead had ᴱQ. orosta as equivalent to ᴱN. oroth “impetus, speed, haste, rash courage”, derived from primitive ᴱ✶orotse (PE13/151); see ᴹQ. orme for discussion.

Neo-Quenya: Since √RŌ/ORO “rise” survives in Tolkien’s later writings, I would retain ᴺQ. orosta “ascension” for purposes of Neo-Quenya.