风中线

Traditional (Taiwan): 風中線

fēngzhōngxiàn ㄈㄥ ㄓㄨㄥ ㄒㄧㄢˋ

    • something precarious and uncertain

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
thread in the wind
Meaning
Something that sways and is precarious or uncertain.

Sources