Early Quenya
rosta-
verb. *to rise
ronta
adjective. hollow
rotwa
adjective. hollow
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!
The Qenya Lexicon of the 1910s had a verb ᴱQ. rōna- “arise, rise, ascend” under the early root ᴱ√RŌ [or ᴱ√ROHO], an inverted variant of ᴱ√ORO (QL/80). It had unusual past forms roa or roi. A similar verb ᴱQ. rosta- appeared in the Early Noldorin Dictionary of the 1920s, equivalent to the ᴱN. rhosta- or amrosta- under the entry ᴱN. amrost “rising” (PE13/159). All later (and many earlier) Quenya verbs for “rise” seem to be based on √OR, such as orya- or orta-, though hints of the inverted root can be seen in later writings with occasional irregular past forms like ronte (PE22/115).