Antonyms for sweetened

Antonyms of verb sweeten

1 of 2 senses of sweeten

Sense 1:

sweeten, dulcify, edulcorate, dulcorate
Antonym of sour (Sense 2)
=>sour, acidify, acidulate, acetify

Antonyms of adj sweetened

1 sense of sweetened

Sense 1:

sugared, sweetened, sweet, sweet-flavored

INDIRECT (VIA sugary) -> sugarless, nonsweet