This is the 11377th most frequent Russian word.
диктатором
"Диктатором" means "dictator" (a ruler with absolute power).
The word 'диктатором' is used in the instrumental case to indicate the role or identity someone assumes, which is typical for the verb ' стать '.
Он стал диктатором в 1925 году.
He became a dictator in 1925.
The word is presented in the genitive case as ' диктатора '. The sentence signifies possession or association of style with a dictator.
В его действиях чувствовался стиль диктатора.
In his actions, the style of a dictator was felt.
Here, 'диктатором' is employed in the instrumental case to indicate the agent through whom the governing occurs.