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