احتطب

Also (assumed tropical:) It (rain) tore up the roots, or stems, of the trees [as though it made firewood of them]. (K.)

(assumed tropical:) He (a camel, TA) fed upon the small and dry parts of the branches. (K, TA.) This a camel does only by reason of soundness, and of surpassing strength. (TA.)

احتطب عَلَيْهِ فِى الأَمْرِ i. q. احتقب [apparently meaning (assumed tropical:) He took upon himself a burden, or a responsibility, in the affair; as though he bound it like a bundle of firewood upon his back]. (K.)