不管 (bù guǎn) — no matter (what, who, how, whether, etc.); regardless of

A drawing of the thing itself, worn down over three thousand years into a few strokes.

The picture in 不 originally showed a flower’s calyx; the “no” sense came later from a related character, not from this picture.

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

管 has 竹 (bamboo) on top to show it relates to bamboo, and 官 gives its sound.