Crossword clues for the word: WEAKEN The word WEAKEN has appeared as an answer to at least 8 crossword clues on different crossword puzzles. Crossword clues for WEAKEN Showing 1 to 8 of 8 results Clue(s) Debilitate. Lose clout Lose strength Make less powerful Make less strong Reduce the strength of Undermine We get a little chap to give way