weak at something

According to the comments, the set was a bit weak at times.

Will is too weak to openly tell her that, at 48, he would rather not be a father again.

Instead, he died, too weak at the end, according to the Times, to walk up the stairs of his house.

The West hand must be very weak, with at most the heart queen.

He remembered that the computer was weak on fine control at long range.

Something about his eyes made me go weak at the knees.

They have been weak on the field and at the gate.

It was weak at such a distance, but strong enough that its light picked them out.

In general, the commercial fishing industry is not for the weak at heart.

China was very weak at this time, and the people were hungry.