光輝|こうきkouki[1]atamadaka (head-high)

1. nounbrightness; splendour; splendor

• Synonym輝きかがやきNeutralThe everyday word for brightness, covering both physical light and a person's sparkle, as in 「目の輝き」; 「光輝」 is more literary.
• Synonym光彩こうさいWrittenWritten word for beautiful radiance, often in 「光彩を放つ」 to mean standing out; 「光輝」 can also figuratively mean glory.
• SynonymきらめきNeutralLight that flickers or twinkles, stressing the flashing movement; figuratively a flash of brilliance, as in 「才能の煌めき」.
• Related栄光えいこうNeutralGreat honour or glory, used mostly figuratively; its literal sense of an auspicious light exists but is rare.
• Related栄誉えいよFormalFormal word for honour, typical of award and commendation contexts; unlike 「光輝」 it never refers to physical light.
• Related名誉めいよNeutralEveryday word for honour and reputation; also used as a prefix, as in 「名誉教授」. It does not refer to light.
• Related栄冠えいかんWrittenWritten word. Originally the victor's laurels; figuratively winning a championship, common in sports reports.
• Related誉れほまれWrittenLiterary native word for honour worth boasting of, as in 「郷土の誉れ」; carries an archaic, elegant feel.
• Related栄名えいめいWrittenRare written word for a fine name or honour; in ordinary usage say 「名誉」.
• Antonym暗黒あんこくNeutralAntonym: darkness without light, also figuratively a hopeless future — the opposite of radiant 「光輝」.

For light in everyday speech use 「輝き」, and for twinkling light 「煌めき」. For figurative glory choose 「栄光」 or 「名誉」. 「光輝」 itself is literary and often appears in set phrases like 「光輝ある」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 輝かがやく光ひかり。輝光てるみつ。
2. （比喩的ひゆてきに）栄誉えいよ。栄光えいこう。