Meaning ‘self’, generally used as a prefix

autoaut
autobahn
autobiography
autoclave
autocorrect
autocrat, autocracy, autocratic
autodidact
autofocus
autogenesis
autograph
autoimmune
automatic
automate, automatic, automation, automaton
automobile
automotive
autonomy, autonomous, autonomic
autopilot
autosome
autotroph
autoworker
authentic
authentically
authenticate
authenticity
autism
autistic
autopsy