shēng​shū

out of practice

生疏 shēng​shū
out of practice adjective
having lost proficiency or skill due to lack of regular practice; rusty

I haven't written in English for a long time, so my writing has become rusty.

unfamiliar adjective
not well known or familiar; feeling distant or strange in relationship

We haven't seen each other for years and feel a bit distant.

Frequency

Movie subtitles
1.22 per million appears in 1% of films
Written text
1.66 per million

Details

HSK 2.0
Level 6

Sources

Definitions
CC-CEDICT