An expression telling someone not to worry about something; 'don't worry about it' or 'forget it.'
遅れてごめん、気にしないで。
Sorry I'm late — don't worry about it.
その傷は大したことないよ、気にしないで。
That scratch isn't a big deal; don't worry about it.
プレゼントが気に入らなかったら、気にしないで正直に言ってください。
If you don't like the gift, don't worry — please tell me honestly.
相手に失礼なことを言われても、気にしないで続けてください。
Even if someone says something rude to you, don't worry and please continue.