Origin of simmer

First recorded in 1645–55; alteration of earlier simper < ?

OTHER WORDS FROM simmer

sim·mer·ing·ly, adverbre·sim·mer, verbun·sim·mered, adjectiveun·sim·mer·ing, adjective

synonym study for simmer

3. See boil1.
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British Dictionary definitions for simmer down (1 of 2)

simmer down

verb (adverb)

(intr) informal to grow calmer or quieter, as after intense rage or excitement
(tr) to reduce the volume of (a liquid) by boiling slowly

British Dictionary definitions for simmer down (2 of 2)

simmer
/ (ˈsɪmə) /

verb

to cook (food) gently at or just below the boiling point
(intr) to be about to break out in rage or excitement

noun

the act, sound, or state of simmering

Word Origin for simmer

C17: perhaps of imitative origin; compare German summen to hum
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Idioms and Phrases with simmer down

simmer down

Become calm after anger or excitement, as in Simmer down, Mary; I'm sure he'll make it up to you, or I haven't time to look at your report now, but I will when things have simmered down a bit. This idiom derives from simmer in the sense of “cook at low heat, below the boiling point.” [Second half of 1800s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.