fat people are always weak to run evry week. that's why their fat!
the engine for my mom's car sounded weak
Weak is an adjective in that sentence. It describes the noun "answer".
He made her body enervate into a couch potato. This sentence works because the word means to cause someone to feel weak.
Her drug use will debilitate her family. That is a good sentence it means to make someone weak or make something be delayed.
I don't believe in hypnotism on its classical meaning. May be it works for weak minds.
The robber had to languish in prison for his crimes.
The children were languished of love and food.
All the farmers agreed that the small, weak RUNT would never amount to any thing.
The weak economy is a burden to all Ohioans and a burden to our state government.Oxen and donkeys are beasts of burden.
The patient's pulse was weak and irregular. After medication, the patient's pulse was strong and regular at 88 beats per minute.
Susan had to be put into braces due to her weak knees.
Infirm's synonym is weak so just use the common word weak in a sentence and replace it with infirm. For instance... My grandmother became weak with age. My grandmother became infirm with age. Voila! By doing that you just made a sentence for INFIRM.