indomitable
in·do·mi·table
adjective
1.
impossible to subdue
Origin
From Late Latin indomitābilis, from in- (“not”) + domitō, frequentative of domō (“to tame”). By surface analysis, in- + domitable.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.