Albert Barnes Commentary Lamentations 2:13

"What shall I testify unto thee? what shall I liken to thee, O daughter of Jerusalem? What shall I compare to thee, that I may comfort thee, O virgin daughter of Zion? For thy breach is great like the sea: who can heal thee?" — Lamentations 2:13 (ASV)

Equal - that is, “compare.” Zion’s breach, that is, her destruction, is measureless, like the ocean.