IPA: /ˌɪnəˈpærənt/
KK: /ɪnəˈpɛrənt/
Not easily seen or understood; not obvious or clear.
The changes in her behavior were inapparent to most people.
Inapparent is formed from "in-" (meaning not) and "apparent" (from Latin "apparens", meaning visible or evident). The word describes something that is not visible or not easily seen.
Think of 'not' ('in-') being added to 'visible' ('apparent') — that's why inapparent means something that is not visible.