taru-adjective, adverb taking the 'to' particle
slight; trifling; insignificant
Literary and rare; describes something extremely small, trivial, or barely noticeable. Often used with たる or として.
眇眇たる差で勝負が決まった。
The match was decided by a trifling difference.
彼の貢献は眇眇として語るに足らない。
His contribution is so slight that it is not worth mentioning.
僅か is a common word for 'slight' or 'a little', while 眇眇 is a rare literary expression emphasizing extreme insignificance.
些細 means 'trivial' or 'minor' and is used in everyday contexts; 眇眇 is far more formal and archaic.
The exact derivation is uncertain; the kanji 眇 means 'minute' or 'tiny', and the reduplication intensifies the sense of extreme smallness.