to grind: i.e. to do women's work.
children. young children, youths.
fell. staggered.
under the wood: i.e. under [the weight or load] of the wood (they were compelled as bond-slaves to carry).
Related Commentaries of Lamentations 5:13
Lamentations 5:13
13 They took the young men to grind, and the children fell under the wood.