Definition of auto- in English:

auto-

Syllabification: auto-
(usually aut- before a vowel)

combining form

1Self: autoanalysis
1.1One’s own: autograph
1.3By itself or automatic: autofocusing

Origin

from Greek autos 'self'.

Definition of auto- in:

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Word of the day flagitious
Pronunciation: fləˈjiSHəs
adjective
(of a person or their actions) criminal; villainous