IPA: /ɪˈmɒdərəsi/
KK: /ɪˈmɒdərəsi/
The state of being excessive or lacking moderation in behavior or actions.
His immoderacy in spending led to financial troubles.
Immoderacy is formed from "im-" (meaning not) and "moderatus" (from Latin, meaning measured or moderate) and the suffix "-cy" (meaning the state or condition of). The word describes the state of being not moderate or excessive in behavior or actions.
Think of 'not' ('im-') being 'measured' ('moderatus') — that's why immoderacy means a lack of moderation.
No commonly confused words.