indefatigableness indefatigable • indefatigably · · · Info · Definitions · Synonyms · Characters · · indefatigableness · · Text Latin · · Script 17 · · Length Definitions · · · (noun) tireless determination. Synonyms: indefatigability, tirelessness. · · Noun Definition 1 Synonyms · · · indefatigability · · Synonym 1 tirelessness · · Synonym 2 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073 t latin small letter t U+0074