shì​yán

oath

誓言 shì​yán
oath noun
a solemn promise or vow

He broke the vow he had made.

pledge verb
to formally promise or vow to do something

Leaders of both countries pledged to strengthen cooperation.

Frequency

Movie subtitles
10.4 per million appears in 4% of films
Written text
6.40 per million

Sources

Definitions
CC-CEDICT