Definition of retardnext

Synonym Chooser

How is the word retard distinct from other similar verbs?

Some common synonyms of retard are delay, detain, slacken, and slow. While all these words mean "to cause to be late or behind in movement or progress," retard suggests reduction of speed without actual stopping.

language barriers retarded their progress

When can delay be used instead of retard?

The meanings of delay and retard largely overlap; however, delay implies a holding back, usually by interference, from completion or arrival.

bad weather delayed our arrival

When might detain be a better fit than retard?

The words detain and retard can be used in similar contexts, but detain implies a holding back beyond a reasonable or appointed time.

unexpected business had detained her

When could slacken be used to replace retard?

While in some cases nearly identical to retard, slacken suggests an easing up or relaxing of power or effort.

on hot days runners slacken their pace

How do slow and slacken relate to one another, in the sense of retard?

Both slow and slacken also imply a reduction of speed, slow often suggesting deliberate intention.

medication slowed the patient's heart rate

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of retard But that approach is rather slow to respond and is limited to applying retarding force. — IEEE Spectrum, 26 June 2018
Recent Examples of Synonyms for retard
Verb
  • These are rooms that encourage guests to slow down, disconnect from digital intrusions, and recenter themselves.
    — Robb Report Studio, Robb Report, 3 Oct. 2026
  • The project’s lengthy construction timeline and challenging terrain could push costs higher, while slowing demand could leave buyers locked into take-or-pay contracts lasting 20 years or more, Yoo said.
    — Jenny Lee, CNBC, 2 Oct. 2026
Verb
  • Nine days later, a Qantas Airbus A321 had to brake while taxiing to allow another Qantas 737 to pass in front of it.
    — Andrea Margolis, FOXNews.com, 2 Oct. 2026
  • Smoother downshifts while braking matter more, but trying to step up a gear at full throttle anywhere near redline seemed to challenge the clutch-free system.
    — Michael Van Runkle, Robb Report, 21 Sep. 2026

Browse Nearby Words

Cite this Entry

“Retard.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/retard. Accessed 9 Oct. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!