noun-modifying (irregular)
Describes thinking, analysis, or insight that is sharp, thorough, and free of ambiguity. Often used in formal or literary contexts.
His penetrating analysis revealed the essence of the problem.
透徹した論理で反論を退けた。
She refuted the counterargument with lucid logic.
Compound of 透 (to penetrate, to be transparent) and 徹 (to go through, to be thorough). The form 透徹した is the prenominal form of the verb 透徹する, which is not commonly used in modern Japanese outside of this adjectival form.