Syriac

bly - to be worn out, old; to age (LSyr. 74, SL 156)

PS
*bly - to be old, worn out (CDG 98; Kogan 2015: 184; EDA I 212)

Connection with ESA blyt ‘to be buried suggested by W. Müller (1962: 29, 1963: 307) is doubtful (CDG 98)