透とう徹てつ

noun, noun or participle which takes 'suru', intransitive verb

transparency; clarity

Refers to physical or metaphorical transparency, such as clear water, glass, or a pure, unclouded state. Often used in literary or formal descriptions.

• 湖みずうみの水みずは透とう徹てつしていて、底そこまで見みえる。

  The lake water is so clear that you can see all the way to the bottom.

noun, noun or participle which takes 'suru', intransitive verb

coherence; logical clarity

Describes thoughts, arguments, or reasoning that are clear, consistent, and free of contradiction. More abstract than sense 1.

• 彼かれの理り論ろんは透とう徹てつしていて、反はん論ろんの余よ地ちがない。

  His theory is so coherent that there is no room for counterargument.