Retard and Send up

Retard verb - To cause to move or proceed at a less rapid pace.

Send up and retard are semantically related In some cases you can use "Send up" instead a verb "Retard".

Send up verb - To copy or exaggerate (someone or something) in order to make fun of.

Retard and send up are semantically related in hold topic. Sometimes you can use "Retard" instead a verb "Send up", if it concerns topics such as repress.