천천히 (cheoncheonhi) means “slowly”

More examples

운전할 때는 천천히 가세요.un jeon hal ttae neun cheon cheon hi ka se yo

When driving, please go slowly.

A deliberately unhurried pace, with movement kept calm rather than rushed.

느리게neurige: An action takes place at a reduced speed.
느긋하게neugeutage: An action is carried out calmly without feeling pressed for time.

상대에게 천천히 하라고 알리거나 스스로 속도를 늦출 때 쓰는 부사.sang dae e ge cheon cheon hi ha ra go al li geo na seu seu ro sok tto reul neut chul ttae sseu neun pu sa

The form combines a repeated native base with the adverb-forming ending -hi, while the deeper history of the base is uncertain.

In a request, a gentle tone makes this word sound considerate, while a firm tone can make the same request sound like an order.