authoritative

a.1.权威性的;2.官方的,当局的

Aussie, austere, austerely, austerity, Australia, Australian, Australian Rules, Austria, Austrian, Austro-, aut(o)-, authentic, authentically, authenticate, authenticity, author, authoress, authorise, authoritarian, authoritarianism, authoritatively, authorities, authority, authorization, authorization, -isation, authorize, authorize, authorise, authorized, authorship, autism, autistic, auto, auto-suggestion, autobahn, autobiographic, autobiography, autocracy, autocrat, autocratic, autocratically,