A word appearing as sōla “tide” in the Qenya Lexicon and Poetic and Mythological Words of Eldarissa of the 1910s, based on the early root ᴱ√SOLO (QL/85; PME/85).

Neo-Quenya: Since the root ᴹ√SOL continued to be associated with the surf in Tolkien’s later writings (Ety/SOL), I would retain ᴺQ. sóla as the general word for “tide”, as opposed to more specific luimë “high/flood tide” and nanwë “low/ebb tide”.