Mighty is the opposite of weak. It begins with the letter m.
Modern.
The opposite of weak is strong.Where weak means dilute, the opposite is concentrated.
Weak is the antonym (opposite of) the word strong.
antonym comes from the greek, anti, meaning opposite, so the opposite of weak is strong.
An opposite of powerful is weak. An opposite of generous is mean or miserly.
modern
negligibleimpalpableunapparentindefiniteindistinct
An opposite of powerful is weak. An opposite of generous is mean or miserly.
Weak
Weak
weak
The opposite would be faltering, weak, or inconstant.