na-adjective, noun
multiplicity of troubles; troublesome abundance
Describes a situation where problems, tasks, or annoyances are so numerous that they become burdensome. Often used in formal or written contexts.
煩多な事務手続きに追われている。
I am swamped with a multiplicity of troublesome administrative procedures.
煩多を極める苦情の処理に頭を悩ませる。
I am at my wits' end dealing with an extreme abundance of complaints.