in earnest

With genuine intent

In earnest describes serious, sincere intent—the opposite of joking or halfhearted effort.

Once the funding came through, work began in earnest.

Someone speaking in earnest means what they say: I thought she was kidding, but she was in earnest.

The phrase often marks a transition from preliminary to full commitment.

committed

devoted

Loyally and lovingly attached

unwavering · determined · diligent · assiduous · persevering · tenacious · industrious · conscientious · staunch · loyal

intense

fervent

Intensely and sincerely felt

  • passionateIntensely emotional or enthusiastic
  • ardentIntensely enthusiastic or devoted
  • zealousPassionately eager and active

vehement · fiery · impassioned · vigorous · forceful · spirited · animated · enthusiastic · wholehearted · concentrated

sincere

genuine

Truly what it claims

candid · unfeigned · authentic · forthright · transparent · frank · real · unpretentious · trustworthy · bona fide

serious

grave

Serious and worrying

unsmiling · no-nonsense · sober · deliberate · thoughtful · purposeful · weighty · meaningful · significant · consequential

Categories
Opposites
seriousness of intent

in earnesthalfheartedly

Without real interest

half-heartedly · casually · frivolously · flippantly · perfunctorily

sincerity

in earnestjokingly

In a humorous manner

in jest · insincerely · facetiously · tongue in cheek · sarcastically

intensity of effort

in earnesthalfheartedly

Without real interest

lazily · feebly · weakly · tentatively · hesitantly

Family

earnest, earnestly, earnestness

Familiarity
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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G