一个心眼儿
yī​ge​xīn​yǎn​r

single-minded

yī​ge​xīn​yǎn​r single-minded
  1. 一个 一個 yī​ge numeral
    one
    a single person or thing
  2. 心眼儿 心眼兒 xīn​yǎn​r
    heart
    The center of one's thoughts or feelings; one's innermost self.

yī​ge​xīn​yǎn​r stubborn
  1. 一个 一個 yī​ge numeral
    one
    a single person or thing
  2. 心眼儿 心眼兒 xīn​yǎn​r
    tolerance
    One's breadth of mind or capacity for patience and broad-mindedness; often used to describe someone as narrow-minded.