chirk

动词 chirk:

1. make a shrill creaking, squeaking, or noise, as of a door, mouse, or bird

1. I really hope he'll chirk up, and get along comfortable.
   我真希望他振作起来，过得舒服些。

chirk

v.tr.intr.（及物动词和不及物动词）
chirked,chirk.ing,chirks
To make or become cheerful.
使…兴高采烈或变得兴高采烈

来源：
Middle English chirken [to chirp, chirrup]
中古英语 chirken [发出啁啾声，不断地唧唧叫]
from Old English cearcian [to chatter]
源自 古英语 cearcian [吱吱叫]
alteration of cracian [to resound] * see crack
cracian的变化 [引起回声] *参见 crack