IPA: /ɪn.kənˈkluː.sɪv.li/
KK: /ɪnˈkɒnkluːsɪvli/
In a way that does not lead to a clear or definite conclusion.
The results of the experiment were inconclusively presented, leaving everyone uncertain about the findings.
Inconclusively → It is formed from "in-" (meaning not) and "conclusus" (from Latin "concludere", meaning to close or conclude) and the suffix "-ly" (meaning in a manner). The word "inconclusively" means in a manner that does not lead to a conclusion or resolution.
Think of 'not' ('in-') leading to a 'closure' ('conclusus') — that's why inconclusively means not leading to a conclusion.