Similar words: worked up, forked, backed up, marked, markedly, perk, perky, jerk. Meaning: adj. made or become more cheerful or lively.
31. But at my last words he perked up into a kind of startled slyness.
32. As soon as Wen Xiang heard "fate", his ears perked up. He quickly asked, "Isn't the ability to accelerate cause and effect and change fate, Hinayana Buddhism?"
33. After a few minutes'silence, they perked up and argued enthusiastically again.
34. After a few minutes, the students perked up and began a heated discussion.