A word appearing in Lord of the Rings drafts of the 1940s in the name N. Bronwe athan Harthad “Endurance beyond Hope” (SD/62). According to Christopher Tolkien, the form athan is very unclear and uncertain (SD/70 note #6). It might instead be athar, which would be more compatible with the root √THAR “across, beyond” (PE17/14; Ety/THAR).
Conceptual Development: The Gnomish Lexicon of the 1910s had G. {athron “further, beyond” >>} adron “further, beyond, over, on other side” based on G. {athra “across, athwart” >>} adr(a) “lying athwart; situated on far side” (GL/17). This hints that later athan “beyond” may be based on N. ath- “across” (Ety/AT(AT)).
A verb appearing as har “stand” on the back of one version of Thror’s Map from the 1930s (AotH/56). It might be related to ᴹQ. thar- “stand” from 1948 (PE22/126).
Neo-Sindarin: Since the later Elvish root for “stand” is √TAR, I would update this verb to ᴺS. tar- as suggested by Elaran.