Treachersome

adj

Definitions

Adjective
  1. 1
    Characterised or marked by treachery; treacherous

    "Tom was now holding forth hotly upon the "onparalleled [sic] rascality and treachersome villainousness" of the Opposition in the Ontario Legislature. Elizabeth, her eyes alight, ran swiftly past the gate towards her father."

Etymology

From treacher + -some.

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