IPA: /ˌɒpəˈreɪʃənl/
KK: /ˌɑːpəˈreɪʃənl/
Ready to be used or functioning correctly; related to how something operates or works.
The new software is now operational and ready for all employees to use.
Operational → It is formed from "operari" (meaning to work) and the suffix "-al" (meaning relating to). The word "operational" refers to something that is related to or capable of functioning or working.
Think of 'working' ('operari') and remember that 'operational' means something that is capable of functioning or working.