IPA: /ɪnˈkɔːpəˌrɪəli/
KK: /ɪnˈkɔrpəˌrɪəli/
In a way that does not have a physical body or form; in a spiritual or non-material manner.
The ghost appeared incorporeally, floating through the walls without touching anything.
Incorporeally → It is formed from "in-" (meaning not) and "corpus" (from Latin, meaning body) and the suffix "-ally" (meaning in a manner). The word "incorporeally" means in a manner that is not physical or lacking a body.
Think of 'not' ('in-') having a 'body' ('corpus') — that's why incorporeally means something that exists without a physical form.