unconquerable

1. not comparableNot conquerable; indomitable.

   Be careful when power comes to thee also, lest thou too shouldst smite in thine anger or thy jealousy, for unconquerable strength is a sore weapon in the hands of erring man.

   1886 October – 1887 January, H[enry] Rider Haggard, “The Spirit of Life”, in She: A History of Adventure, London: Longmans, Green, and Co., published 1887, →OCLC, pages 282–283

   1 more example

   In computing, the unconquerable trilemma is embodied in the well-known CAP theorem for distributed systems, also called Brewer’s CAP theorem. This states that any distributed database can only attain two of three guarantees: consistency, availability and partition tolerance.

   2023 June 2, Charles Xie, “Trilemma Trade-Offs: A New CAP Theorem For Vector Databases Has Emerged”, Forbes Technology Council, in Forbes, Forbes Media, archived from the original on 06 Jun 2023

   Synonyms: inconquerable

plural unconquerables

1. Someone or something that cannot be conquered.