taru-adjective, adverb taking the 'to' particle
unrest prevailing; turmoil reigning
A yojijukugo describing a state of widespread public unrest or turmoil. Often used in literary or formal contexts.
戦後の混乱で、国内は物情騒然としていた。
In the postwar chaos, the country was in a state of unrest.
物情騒然たる世相を憂う。
Lament the turbulent state of society.