simmer(n = noun.attribute) - temperature just below the boiling point; "the stew remained at a simmer for hours"
is a kind of temperature
Derived form verb simmer₁

   simmer(v = verb.change) - boil slowly at low temperature; "simmer the sauce"; "simmering water"
is one way to boil
Derived forms noun simmer₁, noun simmering₁
Sample sentences: The chefs simmer the vegetables

   To boil gently, or with a gentle hissing; to begin to boil. [1913 Webster]
"I simmer as liquor doth on the fire before it beginneth to boil." [1913 Webster]

   To cause to boil gently; to cook in liquid heated almost or just to the boiling point. [1913 Webster]

simmer, v. & n.
--v.
1 intr. & tr. be or keep bubbling or boiling gently.
2 intr. be in a state of suppressed anger or excitement.
--n. a simmering condition.

Idiom:
simmer down become calm or less agitated.

Etymology:
alt. of ME (now dial.) simper, perh. imit.

VB  excite, affect, touch, move, impress, strike, interest, animate, inspire, impassion, smite, infect, stir the blood, fire the blood, warm the blood, set astir, wake, awake, awaken, call forth, evoke, provoke, raise up, summon up, call up, wake up, blow up, get up, light up, raise, get up the steam, rouse, arouse, stir, fire, kindle, enkindle, apply the torch, set on fire, inflame, stimulate, exsuscitate, inspirit, spirit up, stir up, work up, pique, infuse life into, give new life to, bring new blood, introduce new blood, quicken, sharpen, whet, work upon, hurry on, give a fillip, put on one's mettle, fan the fire, fan the flame, blow the coals, stir the embers, fan into a flame, foster, heat, warm, foment, raise to a fever heat, keep up, keep the pot boiling, revive, rekindle, rake up, rip up, stir the feelings, play on the feelings, come home to the feelings, touch a string, touch a chord, touch the soul, touch the heart, go to one's heart, penetrate, pierce, go through one, touch to the quick, possess the soul, pervade the soul, penetrate the soul, imbrue the soul, absorb the soul, affect the soul, disturb the soul, absorb, rivet the attention, sink into the mind, sink into the heart, prey on the mind, distract, intoxicate, overwhelm, overpower, bouleverser, upset, turn one's head, fascinate, enrapture, agitate, perturb, ruffle, fluster, shake, disturb, startle, shock, stagger, give one a shock, give one a turn, strike all of a heap, stun, astound, electrify, galvanize, petrify, irritate, sting, cut to the heart, cut to the quick, try one's temper, fool to the top of one's bent, pique, infuriate, madden, make one's blood boil, lash into fury, be excited, flush up, flare up, catch the infection, thrill, mantle, work oneself up, seethe, boil, simmer, foam, fume, flame, rage, rave, run mad.

VB  be agitated, shake, tremble, tremble like an aspen leaf, quiver, quaver, quake, shiver, twitter, twire, writhe, toss, shuffle, tumble, stagger, bob, reel, sway, wag, waggle, wriggle, wriggle like an eel, dance, stumble, shamble, flounder, totter, flounce, flop, curvet, prance, cavort, squirm, throb, pulsate, beat, palpitate, go pitapat, flutter, flitter, flicker, bicker, bustle, ferment, effervesce, foam, boil, boil over, bubble up, simmer, toss about, jump about, jump like a parched pea, shake like an aspen leaf, shake to its center, shake to its foundations, be the sport of the winds and waves, reel to and fro like a drunken man, move from post to pillar and from pillar to post, drive from post to pillar and from pillar to post, keep between hawk and buzzard, agitate, shake, convulse, toss, tumble, bandy, wield, brandish, flap, flourish, whisk, jerk, hitch, jolt, jog, joggle, jostle, buffet, hustle, disturb, stir, shake up, churn, jounce, wallop, whip, vellicate.

VB  be hot, glow, flush, sweat, swelter, bask, smoke, reek, stew, simmer, seethe, boil, burn, blister, broil, blaze, flame, smolder, parch, fume, pant, heat, recalesce, thaw, give.

VB  heat, warm, chafe, stive, foment, make hot, sun oneself, sunbathe, go up in flames, burn to the ground (flame), fire, set fire to, set on fire, kindle, enkindle, light, ignite, strike a light, apply the match to, apply the torch to, rekindle, relume, fan the flame, add fuel to the flame, poke the fire, stir the fire, blow the fire, make a bonfire of, melt, thaw, fuse, liquefy, burn, inflame, roast, toast, fry, grill, singe, parch, bake, torrefy, scorch, brand, cauterize, sear, burn in, corrode, char, calcine, incinerate, smelt, scorify, reduce to ashes, burn to a cinder, commit to the flames, consign to the flames, boil, digest, stew, cook, seethe, scald, parboil, simmer, do to rags, take fire, catch fire, blaze.

simmer down