IPA: /ˌɛn.sɪ.kloʊˈpiː.dɪk/
KK: /ˌɛn.sɪ.kləˈpiː.dɪk/
Relating to or having the comprehensive knowledge of an encyclopedia; covering a wide range of subjects.
Her encyclopaedic knowledge of history impressed everyone at the quiz competition.
Encyclopaedic → It is formed from "encyclo-" (from Greek "enkuklios", meaning circular or general) and "paedia" (from Greek "paideia", meaning education or rearing). The word "encyclopaedic" refers to a comprehensive or general knowledge that encompasses various subjects, akin to a circle of knowledge.
Think of 'circular knowledge' ('encyclo-') that encompasses 'education' ('paedia') — this helps you remember that 'encyclopaedic' means having comprehensive knowledge.