hold sway over

hold sway over idiom
Dominate, have a controlling influence over, as in He held sway over the entire department. This idiom uses the noun sway in the sense of “power” or “dominion,” a usage dating from the late 1500s.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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