Antonyms of adj histrionic

1 sense of histrionic

Sense 1
histrionic, melodramatic -- (characteristic of acting or a stage performance; often affected; "histrionic gestures"; "an attitude of melodramatic despair"; "a theatrical pose")

INDIRECT (VIA theatrical) -> untheatrical -- (not suited to or characteristic of the stage or theater; "a well-written but untheatrical play"; "an untheatrical personality")

Similarity of adj histrionic

1 sense of histrionic

Sense 1
histrionic, melodramatic -- (characteristic of acting or a stage performance; often affected; "histrionic gestures"; "an attitude of melodramatic despair"; "a theatrical pose")
       => theatrical (vs. untheatrical) -- (suited to or characteristic of the stage or theater; "a theatrical pose"; "one of the most theatrical figures in public life")