Kairos is an appeal to the timeliness of the argument. Two common rhetorical devices are irony and metaphor. The use of irony in rhetoric is primarily to convey to the audience an incongruity that is often used as a tool of humor in order to deprecate or ridicule an idea or course of action.
Definition of irritant for English Language Learners. : 1  something that makes part of your body sore and painful. : 2  something that is unpleasant or annoying : something that irritates you.
Additional Info. 16 CFR 1500.3 defines a primary irritant as a substance that is not corrosive and that human experience data indicate is a primary irritant and/or means a substance that results in an empirical score of five or more when tested by the method described in Sec. 1500.41. The effect of irritants is temporary.