sathos

English uses "wall" broadly, but many languages distinguish between a constructed barrier that encloses or defends territory, a structural wall belonging to a building, and sometimes a partition wall that divides interior space (English has the rare word "pariet" for this, and Tolkien's Gnomish seems to make the same split with ost-/oss words for external walls and bant for a pariet, though Sindarin and Quenya never developed an equivalent). Words for "wall" often preserve the building techniques of early speakers: German Wand comes from interwoven branches covered with clay, Mauer was borrowed from Latin with masonry, Greek toîkhos relates to kneading or moulding clay, and Sanskrit bhitti originally meant a mat of split reeds. Japanese kabe has been analysed as "place" + "division." In Middle-earth, the nomadic Sindar built little until Círdan's coastal harbour-works, later defensive inland fortifications and Dwarf-assisted halls like Menegroth, and finally the High-Elven masonry of the Noldor, which culminated in Gondolin. Drawing on the Japanese idea of division, the construction-based naming of other languages, and this Sindarin building history, I created the neologism sathos for a structural wall from √SAT "divide, apportion, mark off; space, place" and √SOT "shelter" (sat + sot + ssē), reflecting the idea that the Sindar first partitioned caves and other spaces before building vertical structures. Conservative speakers may prefer to use the word "ram" for any walls.