IPA: /ˌkætəˈtɒnɪkli/
KK: /kætəˈtɑnɪkli/
In a way that shows a lack of movement or response, often associated with a state of catatonia, where a person may be unresponsive or in a trance-like state.
She sat catatonically in the corner, not reacting to anything around her.
Catatonically → It is formed from "catatonia" (from Greek "katatonia", meaning down or against tension) and the suffix "-ically" (meaning in a manner relating to). The word "catatonically" refers to behaving in a manner related to catatonia, which is characterized by a lack of movement or response.
Think of 'catatonia' as a state of being 'down' or 'against' movement, and remember that 'catatonically' describes behaving in that same unresponsive manner.