Diabolic
Definition 1 of 2

Literary usage
Often used in literature to depict villainous characters

In many novels, diabolic characters often have complex backstories that justify their behavior.
Emotional connotation
The word carries strong negative feelings that can evoke fear or anger

Using 'diabolic' in contexts involving betrayal can enhance the emotional impact of the statement.
Contextual awareness
Be cautious using 'diabolic' casually as it lends a serious tone

In casual conversations, you might prefer synonyms like 'evil' or 'bad'.
Compare with
demonicwickedmalevolentcruelsatanic
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