finca adj. "clever" (in petty ways) (PE17:119). A distinct form finca is also mentioned as the cognate of Sindarin fineg, but neither form is clearly glossed. The word-group under consideration has to do with hair(PE17:17).
Quenya
finwa
dexterous; clever, fine, delicate
finca
clever
finya
adjective. clever
fínëa
dexterous
fínëa adj. "dexterous" (PE17:119), also finwa, q.v.
fínëa
adjective. dexterous
finwa adj. "dexterous; clever, fine, delicate" (PE17:119, 181), a similar word is glossed "sagacious" in very early material (LT1:253)