IPA: //ʌnˈswiːtənd//
KK: /ʌnˈswitnd/
Describing something that does not have added sugar or sweetness.
I prefer unsweetened tea because I like the natural flavor of the leaves.
Unsweetened → It is formed from "un-" (meaning not) and "sweet" (from Old English "swete", meaning having a pleasant taste) and "-ened" (a suffix used to form past participles). The word "unsweetened" means not having a sweet taste or flavor.
Think of 'not' ('un-') having a 'pleasant taste' ('sweet') — that's why unsweetened means lacking sweetness.