IPA: /ˌmɛɡəloʊˈmænɪk/
KK: /mɛɡəloʊˈmænɪk/
Having an excessive desire for power, wealth, or importance; often characterized by delusions of grandeur.
The megalomanic leader believed he was destined to rule the world.
Megalomanic → It is formed from "megalo-" (from Greek "megalos", meaning large or great) and "mania" (from Greek "mania", meaning madness or obsession). The word describes a person with an obsession for great power or wealth, often to an exaggerated degree.
Think of someone who has a 'great' ('megalo-') 'madness' ('mania') for power or success — that's what megalomanic means.