ᴺS. [ᴱN.] gwesg adv. and adj. “weakly, *weak” (Category: Weak, Infirm)
ᴱN. gwesg adv. “weakly” (Category: Weak, Infirm)
A word appearing as ᴱN. gwesg “weakly” in Early Noldorin Word-lists of the 1920s (PE13/146). This is the only Elvish word in the published corpus associated with weakness without extra connotations.
Neo-Sindarin: I would retain this word as ᴺS. gwesg and would further assume it can be used as both an adjective “*weak” as well as an adverb “weakly”. It is not clear what its etymology would be in Tolkien’s later conception of the languages, however (< √WESEK?)
Reference ✧ PE13/146 ✧ “weakly”