उर्ज्

उर्जँ = उ ऋज् including चंद्र बिंदी
up superior jump
up superior jump push
up/above straight

धातु पाठ
बलप्राणनयोः =
बल = contain (ब) + sotf (ल) here, sot means material that is to be chipped
प्राणन = प्र + अण +ल्यूट = objectified (limb flow push)
So बलप्राणनयोः refers to contain (note that it is not holding with क or प) material to be chipped and strike (push with extended limb flow form up/above)