*Minor differences ignored. Grouped by changes, with first version listed as example.
He breaketh me - He crushes me.
With breach upon breach - He renews and repeats the attack, and thus completely overwhelms me. One blow follows another in such quick succession, that he does not give me time to recover.
He runneth upon me like a giant - With great and irresistible force - as some strong and mighty warrior whom his adversary cannot resist. The Hebrew is גבור gı̂bbôr - "a mighty one." Septuagint, "The mighty - δυνάμενοι dunamenoi - run upon me." Vulgate, "gigas" - a giant.
He breaketh me with breach upon breach,.... Upon his substance, his family, and the health of his body, which came thick and fast, one after another; referring to the report of those things brought by one messenger upon the back of another, see Ezekiel 7:26;
he runneth upon me like a giant; with great fury and fierceness, with great strength and courage, with great speed and swiftness, causing great terror and distress; he not being able to resist him, any more than a dwarf a giant, and no more, nor so much, a match for him; see Isaiah 42:13.
The image is from storming a fortress by making breaches in the walls (2-Kings 14:13).
a giant--a mighty warrior.
*More commentary available at chapter level.