intractable

From in- +‎ tractable.

• (UK, US) IPA^(key): /ɪnˈtɹæk.tə.bəl/

intractable (comparative more intractable, superlative most intractable)

1. Not tractable; not able to be managed, controlled, governed or directed.
   • 1972, Edsger W. Dijkstra, The Humble Programmer (EWD340):

     And I cannot but expect that this will repeatedly lead to the discovery that an initially intractable problem can be factored after all.

2. (mathematics) (of a mathematical problem) Not able to be solved in polynomial time; too difficult to attempt to solve.
3. Difficult to deal with, solve, or manage. (of a problem)
4. Stubborn; obstinate. (of a person)
5. (medicine) Difficult to treat (of a medical condition).

• intractability
• intractableness
• intractably

• “intractable”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.
• “intractable”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

From in- +‎ tractable.

• IPA^(key): (Central, Balearic) [in.tɾəkˈtab.blə]
• IPA^(key): (Valencian) [in.tɾakˈta.ble]

intractable m or f (masculine and feminine plural intractables)

1. intractable

   Antonym: tractable

• “intractable” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.
• “intractable” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.