根本 (gēn běn) means “fundamental; basic; root; simply; absolutely (not); (not) at all”. It is an HSK 5 Chinese word in the HSK 3.0 vocabulary.
Measure word: 个
Practice each character:
他根本不懂这个问题。
Tā gēnběn bù dǒng zhège wèntí.
He doesn't understand this issue at all.
Updated: 2026-05-27