"liable to fall down," 1680s, from rickets (with + -y (2)), via notion of "weak, unhealthy." Literal sense is from c. 1720 but never common in English. Of material things, from 1799.
实用例句
1. He followed her up a rickety staircase to a squalid bedsit.
他跟着她上了一段摇摇晃晃的楼梯，来到了一间邋遢的卧室起居室两用房间。
来自柯林斯例句
2. Mona climbed the rickety wooden stairway.
莫娜爬上了摇摇晃晃的木楼梯。
来自柯林斯例句
3. He was precautious in crossing the rickety bridge.