hug, embrace, drag, pull
摟 centers on drawing something close: hugging or embracing a person, or dragging and pulling an object toward oneself. The common thread is a hand action that brings things nearer.
摟 combines 扌 (hand) with 婁, which likely contributes the sound and may relate to pulling or gathering. The exact historical development is uncertain.
The hand radical 扌 beside 婁 suggests a hand pulling something close. Imagine a hand reaching out to drag a heavy object into a hug.
For ロウ, picture a low rope being pulled hand over hand: low -> ロウ, and the hand drags it closer.