taru-adjective, adverb taking the 'to' particle
uneven; irregular; of varying lengths or heights
Literary or classical word describing things that are not uniform in height or length, often used with たる or と. Rare in modern conversation; mostly encountered in older texts or formal writing.
山々が参差として連なっている。
The mountains stretch out in an uneven line.
参差たる木々の影が地面に落ちていた。
The shadows of the trees, all of different heights, fell on the ground.