眼がん光こう

noun

gleam in one's eye; sparkle of one's eyes

Refers to the sharp, piercing light or intensity in someone's eyes, often implying strong will, keen perception, or a formidable presence.

• 彼かれの眼がん光こうは鋭するどく、相あい手てを威い圧あつした。

  The gleam in his eyes was sharp and intimidated the other person.

noun

insight; discernment; power of observation

Figurative extension: the ability to see through things, judge accurately, or perceive hidden truths. Often used in phrases like 眼光紙背に徹す (reading between the lines).

• 彼かれの眼がん光こうは鋭するどく、問もん題だいの本ほん質しつをすぐに見み抜ぬいた。

  His insight was sharp, and he immediately saw through to the heart of the problem.