Hebrew

būl - wood block (as fuel) (HALOT 115)

Is probably borrowed from the Akkadian bulû ‘firewood’.

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)