taru-adjective, adverb taking the 'to' particle
brilliant; resplendent
Literary word describing something shining brilliantly or dazzlingly. Typically used as 燦と輝く or 燦たる.
The stars shone brilliantly in the night sky.
She greeted me with a radiant smile.
brilliant; bright
brilliant; radiant; dazzling
Literary kanji; almost always seen in the adverbial form 燦と or in compounds. Not in common use.
The kanji 燦 combines 火 (fire) and 粲 (bright, clear), suggesting a brilliant, fiery light. The reading さん is the on'yomi. The word is used almost exclusively in classical or highly literary Japanese.