深厚 (shēn hòu) means “deep; profound”. It is an HSK 4 Chinese word in the HSK 3.0 vocabulary.
Practice each character:
他们之间的友谊很深厚。
Tāmen zhījiān de yǒuyì hěn shēnhòu.
Their friendship is very deep.
Updated: 2026-07-18