I am translating a text, and I have a sentence that structurally translates into:
"The noble ideal they have in their sights will enter even the darkest souls and convert undefeatably into a charitable reality like every scientific truth"
I do not believe that "undefeatably" is a valid word. Neither is "unconquerably" or "unbeatably"?
I could use "inevitably" but that is not quite the same. The text is about war and peace - not the book, but the concepts - so, a word that relates to defeat in battle would be appropriate.