Il. loud and clear 12. mean and unkind 13. clean and tidy 14. big and strong 15. loving and giving 16. tall and handsome 17. small and expensive 18. nice and warm 19. short and sweet 20. sick and tired

Here are the opposites for the given pairs of words:

12. soft and muffled
13. messy and untidy
14. small and weak
15. cold and selfish
16. short and plain
17. large and affordable
18. mean and cold
19. long and boring
20. healthy and energetic