2to have a bad effect on something or someone in a way that makes them weaker or less successful:
The changes in share values have damaged investor confidence.
emotionally damaged children
WORD CHOICE: WORD CHOICE: damage, hurt, injure, woundDamage means to cause physical harm to a thing or to a part of your body• Fires can damage crops and animals. • He damaged a knee ligament playing rugby.You do not usually talk about damaging a person. Use hurt, injure, or wound instead• He was hurt in a climbing accident (NOT He was damaged in a climbing accident). However, you can talk about damaging an unborn child• German measles in pregnancy can damage your baby.Use hurt or injure to talk about people suffering physical harm as a result of an accident, earthquake, hurricane etc• No one was hurt in the car crash. • We hoped he wasn't seriously injured.!! Do not say 'injure someone's health'. Say 'damage someone's health'.Use wound to talk about someone being hurt by a weapon such as a gun or a knife• He shot dead three people and wounded several others. • a wounded soldier
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.