A Doriathrin noun for “pool”, derived from root ᴹ√MBOTH (Ety/MBOTH). Its Quenya cognate ᴹQ. motto suggests a primitive form of *✶mbottʰō. As pointed out by Helge Fauskanger (AL-Doriathrin/moth), the primitive [mb-] might be expected to have become [b-], since initial nasals usually vanished before stops in Ilkorin, as for example Ilk. bril < MBIRÍL.