CJK Unified Ideograph-8BDB

It names a punitive judgment: condemn, remove, or execute.

It evolved rather than being invented at once: bronze and Chu manuscript stages came before small-seal and clerical forms. Early lexicography glosses 誅 as 討, to punish or chastise, and analyzes it as 言, speech, with 朱 as the sound element. 誅 is the traditional form; 诛 is the simplified form.

Its older use marked forceful punishment of an offender or enemy. Modern Chinese keeps that branch in 诛杀 and 诛戮, while other compounds move the force into condemnation by speech or writing.

What does 诛心 mean?

It condemns the motive behind an act, not just the act.

诛心之论 is criticism that assigns guilt to someone's hidden intention. It carries an older moral-legal idea: intent itself can be judged. When someone calls a comment 诛心, they are saying it stopped examining conduct and started prosecuting motive.

Treat it as a warning about that reasoning, not praise for sharp analysis. If you mean the evidence is harsh, say so; save 诛心 for a claim about why someone acted.