unproper

adjective4

1. •
   (rare) Improper, not according with good standards of behaviour; indecent, indecorous.

   • His equally unproper brother, City Planner Charles W. II, shocked purists in the 19303 by building a flat-topped house in Ipswich. — 1962
2. •
   (no longer used) Improper, not suited for its use or application; inappropriate.

   • The pleasure in the act of Venus is the greatest of the pleasures of the senses: the matching of it with itch is unproper; though that also be pleasing to the touch. — 1627
3. •
   (no longer used) Improper, not according with fact or reason; wrong, irregular.
4. •
   (no longer used) Not belonging to a given person; someone else's.

   • There's Millions now aliue, That nightly lye in those vnproper beds, Which they dare sweare peculiar. — 1603