The Gnomish Lexicon of the 1910s had G. ausin “rich”, probably an adjectival form of G. avos “wealth, fortune, prosperity” (GL/20). Gnomish Lexicon Slips modifying that document instead had awsin or awsirol, glossed “fortune” and connected by a brace (PE13/111). Though translated as nouns, both awsin or awsirol appear to be adjectives, the latter an adjectival form of G. awsir “fortune”. Early Noldorin Word-lists of the 1920s had ᴱN. {aurin >>} awes “rich” with variants gwes and gwest.
Early Noldorin
gwesg
adverb. weakly
gwes(t)
adjective. rich
awes
adjective. rich
gwaist-
verb. to be aware, recognize
hiw
adjective. rich
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?)