sets in

Begins to prevail

Sets in describes something unpleasant beginning and becoming established.

Weather, moods, and conditions set in: Winter has set in, Panic set in when the lights went out, Rigor mortis sets in within hours of death.

The phrase implies the thing taking hold will persist for a while.

Decay sets in.

Despair sets in.

Rarely does anything welcome set in.

Related

fog · dead of night · encroaches · rigor mortis · fatigue · cabin fever · twilight · stillness · creeping dread · anxiety · commence · melancholy · quiet desperation · sadness · rot · malaise · sense of doom · descend

Opposites
onset vs. departure

sets inlifts

Raises or carries upward

clears · fades · passes · subsides · dissipates

gradual establishment vs. sudden appearance

sets inhits

Blows or successes

erupts · explodes · flashes · springs up

PERMANENCE/PERSISTENCE vs. TRANSIENCE

sets incomes and goes

Arrives and departs repeatedly

flickers · fluctuates

Family

set, in, upset, setting, settlement, sets, settling, settler, unsettled

Familiarity
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Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G