impregnability impregn • impregnable · · · Info · Definitions · Synonyms · Characters · · impregnability · · Text Latin · · Script 14 · · Length Definitions · · · (noun) having the strength to withstand attack. Synonyms: invulnerability. · · Noun Definition 1 Synonyms · · · invulnerability · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079