implacability

From Old French, from Latin implacabilitas (“unappeasable”).

implacability (countable and uncountable, plural implacabilities)

1. The quality or state of being implacable.

• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “implacability”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• “implacability”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.