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.
: a substance that makes land, water, air, etc., dirty and not safe or suitable to use: something that causes pollution.ull Definition of POLLUTANT. : something that pollutes. See pollutant defined for English-language learners. See pollutant defined for kids.