ᴱ√USU root. “get out, escape”
The root ᴱ√USU⁽¹⁾ appeared in the Qenya Lexicon of the 1910s with the gloss “get out, escape” and derivatives like ᴱQ. usu- “he escapes” and ᴱQ. uswe “issue, outlet, escape” (QL/98). In the contemporaneous Gnomish Lexicon it had derivatives like G. us(ta)- “leave, depart” and G. uthwen “way out, exit; escape” (GL/75), the latter hinting that the root form may have been a blending with *ᴱ√UÞU. I think it is worth positing a Neo-Eldarin root ᴺ√UTH to salvage these early words for “escape”.
References ✧ LT1A/Dor Faidwen; QL/98