suí​yì HSK5

at will

随意 (隨意) suí​yì
at will adjective
According to one's own wishes or preferences; acting as one pleases.

There are no fixed seats here; please sit wherever you like.

voluntary noun
Performed by choice or under conscious control, often used in a physiological or psychological context.

Voluntary muscles are muscles that can be controlled by one's consciousness.

Frequency

Movie subtitles
18.1 per million appears in 9% of films
Written text
28.3 per million

Details

HSK 2.0
Level 6
HSK 3.0
Level 5

Sources

Definitions
CC-CEDICT