feeble
This term describes a deficiency in power that can be physical, intellectual, or emotional. When applied to a person, it often suggests a state of fragility or vulnerability, frequently associated with old age or illness, though it can also imply a lack of courage or resolve. In non-physical contexts, the word carries a dismissive or critical tone. Describing an argument or an excuse as feeble suggests it is not only weak but perhaps laughably inadequate or transparently false, emphasizing a failure to meet a necessary standard of strength or logic.
Meanings
Lacking physical strength, power, or vigor.
"The patient was too feeble to stand up without assistance."
Lacking strength of character, willpower, or conviction.
"He made a feeble attempt to apologize, but it was clear he was not sincere."