retard
verb (used with object)
to make slow; delay the development or progress of (an action, process, etc.); hinder or impede.
Used to describe an action that will be fully completed or achieved by a specific point in the future.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Ninety percent of children born with the condition will have retarded mental and physical development, experts say.
From Reuters ● Feb. 1, 2016