irrepugnable

He conceived by that which he found in himself, the irrepugnable voice of Cupid, and considered (by that he knew too well) the unbridled fury of cruel...

[…] his Answers are so far off from being demonstrative, that is to say, evident, certain an irrepugnable, as that they are not so much as logical […]

[…] it being an irrepugnable tower against all evil and violence. Living well is the best […]

[…] the latter forthright betook himself to the four brothers and plying them with store of such words as behoved unto the matter, in fine, with irrepugnable arguments […]