Why do words offend and mess with people's feelings?

It seems that people's feelings get hurt for hearing words and if you think of it, certain words and sentences are made to hurt and are made to insult another person, but why does it work? Is it cause you know that their intentions are to disrespect you? Maybe if you call someone a coconut they won't get offended unless maybe you say it aggressively like "COCONUT !😡"

then they will be like I'm not a coconut 😡👉🏽

Its the way you say it and the word, or maybe just the way you say it 🤔
Why do words offend and mess with people's feelings?
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