silā : [f.] a stone. || sīla (nt.) nature; habit; moral practice; code of morality.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

sīla n. = sīra, a plough Kapishṭh

Sanskrit-English Dictionary, by M. Monier William