detriment

date(de) three(tri) men(ment): I was going on a date, met three men on the way, they robbed me they were dangerous and harmed me a lot :(

DE(NEGATIVE)- TREATMENT : When we ill treat people they are harmed.So it does damage to them.

detriment--sounds like destroy men which always leads to damage or loss

de(negative sense)+sentiments:tosomething which is harmful destroys the sentiments of peolple...therefore:harmful