1. excessively mild; more mild than is appropriate, necessary, or effective
Usage: often used to describe a response, punishment, or approach that is too lenient or gentle

Examples

• The teacher's overmild response to the student's misbehavior did not discourage future disruptions.
• Critics argued that the penalty was overmild for such a serious offense.
• His overmild manner made it difficult for him to assert authority in the workplace.
• The sauce was overmild; it needed more spices to have any real flavor.
• An overmild winter meant that many plants did not go dormant as expected.