This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 劀 is uncertain. It visually contains 矞 and 刂, but the original component relationships are unclear.
The right side 刂 suggests a cutting tool, and the left side 矞 is complex. Imagine a rare, intricate blade used for precise carving.
For カツ, picture a sharp blade cutting through a thick katsu (カツ) pork cutlet: the blade slices cleanly, and the sound of the cut is カツ.