The best answer is harsh. The relationship between the first pair of words, spectator and participant, is that of antonyms—words that have opposite meanings. Therefore, the second pair of words must also be antonyms. Harsh is an antonym of gentle.
Yesterday's Analogy Quiz
Tomorrow's Analogy Quiz
About Infoplease, Part of Family Education Network
© 2000–2014 Pearson Education, publishing as Infoplease