Adamant
Unyielding; firm in opinion
Clement
Merciful; lenient
Cliché
A worn-out idea or overused expression
Disparity
Inequality; difference
Inexorable
Unrelenting; unavoidable
Ostensible
Professed but not necessarily true
Extol
To praise highly
Diffident
Lacking in self-confidence; shy
Opus
Creative work, especially a numbered composition
Rancor
Extreme hatred or ill will