an SUFFIX
-anus; (indicates former gens when adopted into another, Sejus -> Sejanus);
augustan.us ADJ 1 1 NOM S M POS
Augustus, Augusta, Augustum ADJ [XXXCO]
August (month) (mensis understood); abb. Aug.; renamed from Sextilis in 8 BC;
augustus, augusta -um, augustior -or -us, augustissimus -a -um ADJ [XEXCO]
sacred, venerable; majestic, august, solemn; dignified; worthy of honor (Ecc);
an SUFFIX
-an, -ain; of, pertaining/belonging to; connected with; derived/coming from;
augustan.us ADJ 1 1 NOM S M POS
Augusta, Augustae N (1st) F [CLICO] Classic
Augusta; (title of Emperor's wife/occasionally other close female relatives);
Augustus, Augusti N (2nd) M [CLIAO] Classic
Augustus; (title of Octavius Caesar, Emperor, 27 BC-14 AD); of all emperors;

Credits:
This, our local install of the popular standby Whitaker's Words, is possible thanks to the resurrection of the venerable project at William Whitaker's Words, where you will also find extensive documentation. The corresponding GitHub repository is where you can submit issues about missing forms and analyses.
This web interface by Walter M. Shandruk.