Oh! I see the problem.
@Agony has never seen a dictionary.
Re·tard-
verb
verb: retard; 3rd person present: retards; past tense: retarded; past participle: retarded; gerund or present participle: retarding
/riˈtärd/
Delay or hold back in terms of progress, development, or accomplishment.
"our progress was retarded by unforeseen difficulties"
noun
noun: retard; plural noun: retards
/ˈrēˌtärd/
A person who has a mental disability (often used as a general term of abuse).
Origin- Late 15th century: from French retarder, from Latin retardare, from re- ‘back’ + tardus ‘slow’.
Can you see how either of these definitions applies to you?