Correct

不谙世故

/ bù ān shìgù /
Strokes

Definition

unworldly/unsophisticated

Example

Definition

know little of the world; be not familiar with the ways of the world; be unsophisticated

1
ān
不谙
rénqíngshì
人情世故

He's not seen much of the world. / He has seen little of life.