WordRel.com

• not belonging to that in which it is contained; introduced from an outside source

  synonym	foreign
  derivation	extraneousness
  similar	adulterantadulterating

• not pertinent to the matter under consideration

  synonym	immaterialimpertinentorthogonal
  derivation	extraneousness
  similar	irrelevant

• coming from the outside

  synonym	externaloutside
  derivation	extraneousness
  similar	extrinsic

• not essential

  derivation	extraneousness
  similar	extrinsic