reduplicate

verb (used with object), re·du·pli·cat·ed, re·du·pli·cat·ing.

1. to double; repeat.
2. Grammar. to form (a derivative or inflected form) by doubling a specified syllable or other portion of the primitive, sometimes with fixed modifications, as in Greek léloipa “I have left,” leípo “I leave.”

verb (used without object), re·du·pli·cat·ed, re·du·pli·cat·ing.

3. to become doubled.
4. Grammar. to become reduplicated.

adjective

5. doubled.

verb (rɪˈdjuːplɪˌkeɪt)

1. to make or become double; repeat
2. to repeat (a sound or syllable) in a word or (of a sound or syllable) to be repeated, esp in forming inflections in certain languages

adjective (rɪˈdjuːplɪkɪt)

3. doubled or repeated
4. (of petals or sepals) having the margins curving outwards

v.

1560s, from Medieval Latin reduplicatus, past participle of reduplicare “to redouble,” from re- “back, again” (see re-) + Latin duplicare “to double” (see duplicate (adj.)). Related: Reduplicated; reduplicating; reduplicative.