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hold someone's feet to the fire

Also, keep someone's feet to the fire. Pressure someone to consent to or undertake something, as in The only way you'll get him to agree is to hold his feet to the fire. This idiom alludes to an ancient test of courage or form of torture in which a person's feet were so placed. It began to be used figuratively in the second half of the 1900s. Also see hold a gun to someone's head.

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You may have read the word "simmer" in a recipe or two, but what does it really mean?
To cook in water that begins cold and then reaches a boil.
To stew in a sauce for a long time.
To cook in water, just below boiling temperature.
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Words nearby hold someone's feet to the fire

hold on to, hold on to your hat, holdout, hold out on, holdover, hold someone's feet to the fire, hold still for, hold sway over, hold the bag, hold the fort, hold the line
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.