to pass through
穿 · 9 strokes
Alludes to creating a hole (穴) with one's teeth (牙). Based on the original meaning "bore a hole". The meaning later expanded to "pass through" and "wear".
过 · 6 strokes
Simplified form of 過. Phonosemantic compound. 辶 represents the meaning and 咼 represents the sound. The 咼 component was simplified to 寸.