TYRANNOUS
oppressive, tyrannical, tyrannous
(adjective) marked by unjust severity or arbitrary behavior; “the oppressive government”; “oppressive laws”; “a tyrannical parent”; “tyrannous disregard of human rights”
Source: WordNet® 3.1
Etymology
Adjective
tyrannous (comparative more tyrannous, superlative most tyrannous)
Tyrannical, despotic or oppressive.
Is tyrannous to sunder them.
Source: Wiktionary
Tyr"an*nous, a.
Definition: Tyrannical; arbitrary; unjustly severe; despotic. Sir P.
Sidney.
– Tyr"an*nous*ly, adv.
Source: Webster’s Unabridged Dictionary 1913 Edition