This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. To make sweet or sweeter by adding sugar, honey, saccharin, or another sweet substance.

v. To make more pleasant or agreeable.

v. To soften or soothe: sweetened her mood.

v. To make bearable; alleviate.

v. Informal To increase the value of (collateral for a loan) by adding more securities.

v. Informal To enhance the attractiveness or financial desirability of (an offer, for example).

v. Games To increase the value of (an unwon poker pot) by adding stakes before reopening.

v. To make less acidic: sweeten the stomach with antacids.

v. To remove sulfur compounds from (fuel oil or gas).

verb-intransitive. To become sweet.

v. To make sweet to the taste.

v. To make pleasing or grateful to the mind or feelings.

v. To make mild or kind; to soften.

v. To make less painful or laborious; to relieve.

v. To soften to the eye; to make delicate.

v. To make pure and salubrious by destroying noxious matter.

v. To make warm and fertile.

v. To restore to purity; to free from taint.

v. To make more attractive; said of offers in negotiations.

v. To become sweet.

v. To make sweet to the taste.

v. To make pleasing or grateful to the mind or feelings.

v. To make mild or kind; to soften.

v. To make less painful or laborious; to relieve.

v. To soften to the eye; to make delicate.

v. To make pure and salubrious by destroying noxious matter

v. To make warm and fertile; -- opposed to sour.

v. To restore to purity; to free from taint.

verb-intransitive. To become sweet.

To become sweet, in any sense.

To make sweet to any of the senses.

To make pleasing or grateful to the mind: as, to sweeten life; to sweeten friendship.

To make mild or kind; soften.

To make less painful or laborious; lighten.

To increase the agreeable qualities of; also, to render less disagreeable or harsh: as, to sweeten the joys or pleasures of life.

To make pure and wholesome by destroying noxious or offensive matter; bring back to a state of purity or freshness; free from taint: as, to sweeten apartments that have been infected; to sweeten the air; to sweeten water.

To make mellow and fertile: as, to dry and sweeten soils.

To wash (gold) with hot water after the parting process.

See the extract.

v. make sweeter in taste

v. make sweeter, more pleasant, or more agreeable

"It's also possible to "sweeten" the amendment in order to avoid potential resistance."

sweetened    sweetening    sweetens   

change    modify    alter   

soften   

soften    relieve   

Beaton    Eton    Keaton    Seton    Teton    Wheaton    beaten    cretin    eaten    seton   

whortleberry    ciabatta    ready-to-drink    makery    soap-making    ADC    tangerine    playwriting    gin-soaked    quick-diagnostic