-aneity

From Latin -āneitās, from -āneus +‎ -tās. By surface analysis, -ane(ous) +‎ -ity.

-aneity

1. Used to form an abstract noun from an adjective, to form the noun referring to the state, property, or quality of conforming to the adjective's description.

   ‎contemporaneous + ‎-aneity → ‎contemporaneity (“the state of being contemporaneous”)

   ‎extemporaneous + ‎-aneity → ‎extemporaneity (“the state of being extemporaneous”)

   ‎extraneous + ‎-aneity → ‎extraneity (“the state of being extraneous”)

   ‎instantaneous + ‎-aneity → ‎instantaneity (“the state of being instantaneous”)

   ‎spontaneous + ‎-aneity → ‎spontaneity (“the state of being spontaneous”)