irritability Copy link Outline 1. stŏmăchus (chagrin, irritation of mind)2. īrācundia (disposition to anger; latent or expressed)3. animus irritabilis, ingenium irritabile • irritability: 1. stŏmăchus (chagrin, irritation of mind): a letter full of i. and querulousness, plena s. et querelarum epistola, Cic. Q. Fr. 3, 4, init. (but the word denotes state of mind rather than permanent character). 2. īrācundia (disposition to anger; latent or expressed): v. irascibility. 3. animus irritabilis, ingenium irritabile: v. irritable.