Correct

飘忽

/ piāohū / 
Strokes

Definition

swiftly moving/fleet/to sway

Example

As a Verb

(of clouds, etc) move swiftly; wave to and fro; fleet

1
Shānwù
山雾
piāohū
飘忽

fleeting mountain mist

As a Verb

move in an uncertain/a mobile/an unsteady manner

2
Piāohūbùdìng
飘忽不定

be mobile/unsteady/uncertain in motion; drift from place to place; move about