她变得太虚弱了，无法下床。

She became too ___feeble to get out of bed.

大多数时候，主人是一个衰弱的、虚弱的老人，几乎听不见你说话，但却可能是个出色的叙述者。

Most of the times, the owner is a decrepit and ___feeble old man, who can hardly hear you, but who can be a magnificent narrator.

病人的脉搏如此微弱，医生难以探测到。

The patient's pulse was so ___feeble that the doctor struggled to detect it.