体会 (tǐhuì) means to understand or realize something deeply through personal experience — it emphasizes the insight gained from firsthand involvement. This sets it apart from 了解 (liǎojiě), which is a more general 'understand or find out' without requiring personal experience, and from 体验 (tǐyàn), which focuses on the act of experiencing itself rather than the resulting understanding. As a noun, 体会 refers to the personal insight or lesson learned.