Comprehension is an important factor of word communication. Understanding word definition is important for comprehension. I like to know the definition of a word when reading to fully 'comprehend' the communication. The following copies are some words that sum up the persuasive aspect of communication. Each of which can be identified in most communications.
Ethos: revived by Palgrave in 1851 from Gk. ethos "moral character, nature, disposition, habit, custom," from suffixed form of PIE base *s(w)e- (see idiom). An important concept in Aristotle (e.g. "Rhetoric" II xii-xiv).
Ethos is an appeal to the authority or honesty of the speaker. It is how well the speaker convinces the audience that he or she is qualified to speak on the particular subject. It can be done in many ways:
* By being a notable figure in the field in question, such as a college professor or an executive of a company whose business is that of the subject.
* By having a vested interest in a matter, such as the person being related to the subject in question.
* By using impressive logos that shows to the audience that the speaker is knowledgeable on the topic.
* By appealing to a person's ethics or character.
Pathos: "quality that arouses pity or sorrow," 1668, from Gk. pathos "suffering, feeling, emotion," lit. "what befalls one," related to paskhein "to suffer," and penthos "grief, sorrow;" from PIE base *kwenth- "to suffer, endure" (cf. O.Ir. cessaim, Lith. kenciu "suffer").
Pathos is an appeal to the audience’s emotions. It can be in the form of metaphor, simile, a passionate delivery, or even a simple claim that a matter is unjust. Pathos can be particularly powerful if used well, but most speeches do not solely rely on pathos. Pathos is most effective when the author connects with an underlying value of the reader.
Logos: 1587, "second person of the Christian Trinity," from Gk. logos "word, speech, discourse," also "reason," from PIE base *leg- "to collect" (with derivatives meaning "to speak," on notion of "to pick out words;" see lecture); used by Neo-Platonists in various metaphysical and theological senses and picked up by N.T. writers. Other Eng. formations from logos include logolatry "worship of words, unreasonable regard for words or verbal truth" (1810 in Coleridge); logomachy "fighting about words" (1569); logomania (1870); logophobia (1923); and logorrhea (1902).
Logos is logical appeal, and the term logic is derived from it. It is normally used to describe facts and figures that support the speaker's topic. Since data is difficult to manipulate, especially if from a trusted source, logos may sway cynical listeners. Having a logos appeal also enhances ethos (see above) because information makes the speaker look knowledgeable and prepared to his or her audience. However, data can be confusing and thus confuse the audience. Logos can also be misleading or inaccurate.
Credits to Online Etymology and Wikipedia.