一根筋

Traditional form:

一根筋

Pinyin (reading):

yīgēnjīn

Definitions:

• stubborn
• inflexible
• one-track minded

Characters:

• 一 - one; a, an; alone
• 根 - root, basis, foundation
• 筋 - muscles; tendons

Traditional characters:

• 一 - one; a, an; alone
• 根 - root, basis, foundation
• 筋 - muscles; tendons