A noun appearing as tāva “great tree” in a list of “large & small” roots from around 1968 derived from the root √TAW “wood”.
Conceptual Development: The Qenya Lexicon of the 1910s had ᴱQ. taule “great tree” under the early root ᴱ√TAVA “beam”, a homonym of ᴱQ. taule “pillar” under the early root ᴱ√TAW̯A (QL/90).
táva noun "great tree" (PE17:115)