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.
3. (of a problem) Difficult to deal with, solve, or manage.
4. (of a person) Stubborn; obstinate.
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
• intractable in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913

in- +‎ tractable

• (Balearic, Central) IPA^(key): /in.tɾəkˈta.blə/
• (Valencian) IPA^(key): /in.tɾakˈta.ble/

intractable (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.