asepsis

n [U] state of being free from harmful bacteria 无菌; 无毒.

asbestosis, ascend, ascendancy, ascendancy (also ascendency), ascendant, ascendant (also ascendent), ascension, Ascension Day, ascent, ascertain, ascertainable, ascertainment, ascetic, ascetically, asceticism, ascorbic acid, ascribable, ascribe, ascription, ASEAN, aseptic, asexual, asexuality, ash, ash blonde, ash plant, Ash Wednesday, ashamed, ashen, ashes, ashore, ashpan, ashtray, ashy, Asia, Asian, Asiatic, aside, aside from, asinine,