The Collaborative International Dictionary
Tyrannously
Tyrannous \Tyr"an*nous\ (t[i^]r"an*n[u^]s), a.
Tyrannical; arbitrary; unjustly severe; despotic.
--Sir P.
Sidney. -- Tyr"an*nous*ly, adv.
Wiktionary
tyrannously
adv. In a tyrannous manner.