沉重 (chén zhòng) means “heavy; hard; serious; critical”. It is an HSK 6 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
他的心情很沉重,忧心忡忡。
Tā xīnqíng hěn chénzhòng.
His mood is very heavy.
Updated: 2026-05-27