preverb

/ˈpriːvɜrb/
noun
  1. A prefix or particle that is attached to the beginning of a verb to change its meaning, found in some languages.
    • The preverb 'ge-' in German is used to form the past participle of many verbs.
    • Linguists study how preverbs in ancient Greek added spatial or directional meaning to verbs.
    • In Russian, the preverb 'po-' can indicate the beginning of an action, as in 'pobezhat' (to start running).
Synonyms