A verb appearing as ᴱQ. tyosto- “to cough” in the Qenya Lexicon of the 1910s derived from the early root ᴱ√TYOSO of the same meaning (QL/50).
Neo-Quenya: I’d adapt this word as ᴺQ. tyosta- “to cough” for purposes of Neo-Quenya, based on a Neo-Root ᴺ√TYOS.
A word appearing as ᴱQ. tyos (tyoss-) “a cough” in the Qenya Lexicon of the 1910s derived from the early root ᴱ√TYOSO of the same meaning (QL/50).
Neo-Quenya: I’d retain ᴺQ. tyos “cough” for purposes of Neo-Quenya from a Neo-Root ᴺ√TYOS.