uncastable

un- +‎ castable

uncastable (comparative more uncastable, superlative most uncastable)

1. That cannot be cast (filled with, or allocated, a theatrical role).
   • 1974 January 21, New York Magazine, volume 7, number 3:

     Colleen Dewhurst, though in many ways wrong for the virtually uncastable Josie, is as lucid and luminous […]

   • 1996, Scott Donaldson, The Cambridge companion to Hemingway:

     […] that he would, like many actors, become so stereotyped in the public mind as to be uncastable in other roles […]

2. (computing, programming) That cannot be cast (converted to other data types).
   • 2000, Larry Wall, Tom Christiansen, Jon Orwant, Programming Perl:

     They're strongly typed, uncastable pointers […]

3. (medicine) That cannot be set in a cast.
   • 2005, Mercer Rang, Maya E Pring, Dennis Ray Wenger, Rang's children's fractures:

     ...internal fixation in children with open, unstable, or otherwise uncastable forearm fractures […]

4. That cannot be used for, or produced through, casting (manufacturing with a mould).
   • 1943, The Mining Magazine:

     Casting must be done within a day or two of moulding or the moulds will begin to wind-dry and become uncastable […]

   • 1982, Production engineering:

     This allows the casting of otherwise uncastable materials, with acceptable rejection rates, and can increase ductility by as much as a factor of six.