weak, feeble, and frail mean not strong enough to stand pressure or hard effort. weak can be used of either a temporary or permanent loss of strength or power.

Can weak be used as a noun?

(uncountable) The condition of being weak. (countable) A special fondness or desire.

What does it mean to be called weak?

If you describe someone as weak, you mean that they are not very confident or determined, so that they are often frightened or worried, or easily influenced by other people.