taru-adjective, adverb taking the 'to' particle
glaring; piercing; penetrating
Literary expression describing eyes that are sharp, bright, and intense, often suggesting keen insight or strong emotion. Used as a taru-adjective or adverbially with と.
He glared at his opponent with piercing eyes.
The old man's eyes still shone brightly and sharply.
with shining, piercing eyes
Standard kanji form for this literary expression.
Rarely used kanji form; 烱 is a variant of 炯.
Variant using the non-repetition kanji 炯; less common but still encountered.
Rarely used kanji form; 烱 is a variant of 炯.
The exact derivation is uncertain; the kanji 炯 and 烱 both carry the meaning 'bright, shining', and the reduplicated form emphasizes intensity. The word is used in classical and literary Japanese to describe a sharp, glaring light, especially of the eyes.