IPA: /ˌʌn.səˈpɔː.tɪd/
KK: /ʌnˈsʌpɔrtɪd/
Not having any help, backing, or confirmation from others.
The project was left unsupported after the funding was cut.
Unsupported → It is formed from "un-" (meaning not) and "supported" (from Latin "supportare", meaning to carry or bear). The word "unsupported" means not carried or not held up, indicating a lack of support.
Think of 'not' ('un-') being involved in something that is 'carried' ('supportare') — that's why unsupported means something that is not held up.