Source : Webster's Revised Unabridged Dictionary (1913)

Unchancy \Un*chan"cy\, a. [Pref un- + Scot. chancy fortunate,
   safe.]
   1. Happening at a bad time; unseasonable; inconvenient. --A.
      Trollope.

   2. Ill-fated; unlucky. [Prov. Eng. & Scot.]

   3. Unsafe to meddle with; dangerous. [Scot.]