The "two kANI's" of information I found in a Sanskrit dictionary.
I hope this clears some confusion.
sita: (viSEshaNamu) tellanidi, paMcadAra
sIta: rAmuni bhArya, nAgaTi cAlu
Sita: (viSEshaNamu) vADiyaina
(as in "niSita dRshTi" etc.)
and the Brown dictionary defines Sitamu as,
Sitamu: (adjective) #Sharpened, whetted, thin, weak, feeble#
vADiyaina, durbalamaina, bakkayaina
-- Padma