retardest

Verb

retard (third-person singular simple present retards, present participle retarding, simple past and past participle retarded)

1. (transitive) To keep delaying; to continue to hinder; to prevent from progressing.
   • retard the march of an army

   Synonyms:

   impede, hinder, hold up, decelerate

2. (transitive) To put off; to postpone.
   • to retard the attacks of old age

   Synonyms:

   postpone

3. (obsolete, transitive) To be slow or dilatory to perform (something).
4. (intransitive) To decelerate; to slow down.
   • 70, 60, 50, 40, 30, 20, retard, retard...2019, Airbus A350 - Landing (Retard) (YouTube), cockpit voice (actor)

   Synonyms:

   decelerate, slow, slow down, slow up

5. (intransitive, obsolete) To stay back.
   • Some years it [The River Nile] hath also retarded, and come far later than usually it was expected1650, Thomas Browne, Pseudodoxia Epidemica: […], 2nd edition, London: […] A[braham] Miller, for Edw[ard] Dod and Nath[aniel] Ekins, […], →OCLC

   Synonyms:

   hang back

See all 9 meanings of retard