yáo​bǎi​bù​dìng

indecisive

摇摆不定 (搖擺不定) yáo​bǎi​bù​dìng
indecisive expression
hesitant and unable to make a firm choice or decision between multiple options

He is wavering between two job opportunities and can't seem to make a decision.

wavering expression
fluctuating or unsteady in one's stance, opinion, or physical state

Due to the heavy wind and waves, the small boat is rocking on the river.

Frequency

Movie subtitles
1.52 per million appears in 1% of films
Written text
0.732 per million

Sources

Definitions
CC-CEDICT