discard, abandon, throw away
撇 centers on the act of removing something unwanted: discarding, abandoning, or throwing away. The hand radical suggests a deliberate physical action of casting aside.
撇 combines 扌 (hand) with 敝, which likely contributes the sound and the idea of breaking or ruining. The hand action of discarding or throwing away fits this structure.
The hand radical 扌 beside 敝 suggests a hand sweeping away broken or useless things. Imagine using your hand to brush debris off a table: you discard what is no longer needed.
For ヘツ, imagine a hand tossing away a hot, sizzling piece of metal that makes a sharp 'hets' sound as it hits the ground: hets -> ヘツ.