auxiliary

a.辅助的，备用的

autocross, Autocue, autograph, automat, automate, automatic, automatic pilot, automatic transmission, automatically, automation, automaton, automobile, automotive, autonomous, autonomously, autonomy, autopsy, autostrada, autumn, autumnal, AV, avail, avail oneself of, availability, available, avalanche, avant-garde, avarice, avaricious, avariciously, avdp, Ave, avenge, avenger, avenging, avenue, aver, average, averagely, averse,