貫 means “pierce, carry through”

つらぬく · tsuranuku

Also: 8 1/3lbs, penetrate, brace

Kun'yomi (Japanese reading)
つらぬく, ぬく, ぬき
On'yomi (Chinese reading)
カン

JLPT N1 · Taught in secondary school · 11 strokes

The story

Shells (貝), the old money, threaded on a cord (the pierced shape on top): strung straight through. 貫く is to pierce, or to stick to your principles, 一貫 is consistency, and at a sushi counter nigiri are counted in 貫.

Used in 貫く (tsuranuku, to pierce/stick to), 一貫 (ikkan, consistency), and 貫禄 (kanroku, dignified presence)

More from Grit & Resolve

Learn 貫 and more kanji free on Fuji Learning · All kanji

Readings from KANJIDIC2, © EDRDG, CC BY-SA.