What does retardate mean?
Retardate is a formal verb meaning to delay or slow the progress, development, or completion of something. It is often used in technical, institutional, or legal contexts, though the more natural everyday choices are “delay” and “slow.” The word can describe physical effects, such as slowed growth or delayed construction, as well as figurative obstacles to progress. Its relatively uncommon status makes it more noticeable than everyday synonyms, but it remains readily understandable. Retardate ultimately derives from Latin roots associated with lateness or slowness, the same broad source as tardy. The related noun “retardate” is now obsolete and offensive when applied to a person; it should not be used in contemporary descriptions of intellectual or developmental disability.
To delay or slow the progress, development, or completion of something.
"The damage to the engine retarded the aircraft's progress across the runway."
Formal and relatively uncommon; “delay” or “slow” will usually sound more natural.
Historically, a person described as having impaired intellectual development.
"The term appeared in nineteenth-century medical literature."
Obsolete and offensive in this sense. Current language should describe the specific condition or support a person directly, rather than using this label.
This plural belongs only to the obsolete and offensive noun sense; it is not used for the verb.
"The historical text uses the obsolete label without qualification."
Retardate comes from the same Latin root as tardy: both point to being held back in time or progress.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does retardate come from?
Retardate was formed in English from the Latin verb retardare, meaning “to delay” or “hold back,” which was based on tardus, meaning “late” or “slow.” English adopted the form in the early 19th century, initially in scientific and medical contexts. It shares its Latin foundation with English words such as tardy and tarditude, as well as the scientific term tardigrade.
Related word forms
How retardate is actually used
Retardate is formal, comparatively rare, and somewhat old-fashioned. The more idiomatic modern verb is usually “delay” or “slow.” In figurative use, it can suggest an undesirable obstruction of progress.
Easily confused with retardate
Retard is the more usual modern verb, while retardate is a rarer formal equivalent used especially in technical or legal contexts.