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