weaken

Meanings

• lessen the strength of
  • "The fever weakened his body"
• become weaker
  • "The prisoner's resistance weakened after seven days"
• destroy property or hinder normal operations
• reduce the level or intensity or size or scope of
• lessen in force or effect

Synonyms

break, counteract, countermine, damp, dampen, de-escalate, sabotage, soften, step down, subvert, undermine