Numbers 10, 20, 30, 40, and 50 Part of speech: Noun Definition: foe, opponent, adversary Sentence: In most stories, the hero always manages to defeat the antagonist. Note the prefix anti, meaning “against.” Part of speech: noun Definition: sympathy, helpfulness or mercy Sentences: She showed her compassion when she took the injured cat home and kept it comfortable until it died. Note the suffix ion meaning “act, result, or state of.” Part of speech: adjective Definition: careful and hard-working Sentence: Due to his diligent work, the business grew from a single shop to a national chain over 35 states. Part of speech: noun Definition: irritation, frustration Sentence: My exasperation with my secretary grew each time she forgot to ask for a caller’s phone number – I finally had to fire her. Note the prefix ex meaning out, and the suffix “ate” meaning having or showing. Part of speech: adjective Definition: rash, impulsive, acting without thinking Sentence: By a stroke of luck, my impetuous decisions created a huge profit for the company that year – but I could have just as easily been responsible for the company’s demise.