automatic

a.自动的；机械的，无意识的

authorize, authorize, authorise, authorized, authorship, autism, autistic, auto, auto-suggestion, autobahn, autobiographic, autobiography, autocracy, autocrat, autocratic, autocratically, autocross, Autocue, autograph, automat, automate, automatic pilot, automatic transmission, automatically, automation, automaton, automobile, automotive, autonomous, autonomously, autonomy, autopsy, autostrada, autumn, autumnal, auxiliary, AV, avail, avail oneself of, availability, available,