(adjective, verb)


1. made smaller or less, resulting from reduction.

Similar word(s): impaired, diminished, lessened, vitiated

2. made weak or weaker

Similar word(s): weak

3. reduced in strength

Similar word(s): decreased, reduced, attenuate, attenuated, faded

4. mixed with water

Similar word(s): dilute, diluted, cut, thinned

5. damaged; used of inanimate objects or their value

Similar word(s): damaged, hurt

Sentences with weakened as an adjective:

- His weakened immune system couldn't cope with the infection.


1. simple past tense and past participle of weaken