níng​zhòng

deep

凝重 níng​zhòng
deep descriptive
deep and resounding in sound or music

The sound of the cello is deep and solemn.

dignified descriptive
dignified or grave in appearance, expression, or attitude

His expression was solemn, as if he were making a major decision.

heavy descriptive
thick or heavy in atmosphere, color, or style

The atmosphere at the meeting was very solemn.

Frequency

Movie subtitles
0.150 per million appears in 0% of films
Written text
4.08 per million

Sources

Definitions
CC-CEDICT