noun
dissident element; discontented element
Used in political or organizational contexts for a person or faction that does not align with the mainstream, often implying ideological impurity or disloyalty.
党内の不純分子を排除しようとする動きがあった。
There was a move to purge dissident elements within the party.
彼は組織から
He was regarded as a discontented element by the organization.