Early Quenya
orosta
noun. ascension
orosta
noun. impetus, speed, haste, rash courage
rosta
noun. ascension
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
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√ORO (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.