IPA: /ˌpoʊstəˈrɛtɪvli/
KK: /ˌpoʊstəˈrɛtɪvli/
In a context related to the time after a surgical operation.
The patient was monitored closely postoperatively to ensure a smooth recovery.
Postoperatively → It is formed from "post-" (meaning after) and "operari" (meaning to work or to operate). The word refers to the period after a surgical operation or procedure.
Think of 'after' ('post-') a 'surgery' or 'operation' ('operari') — that's what postoperatively means.