IPA: /ˌæpəˈdɪktɪkli/
KK: /æpəˈdɪktɪkli/
In a way that is clearly established or certain, leaving no room for doubt.
The scientist presented his findings apodictically, ensuring everyone understood the certainty of his conclusions.
Apodictically is formed from "apo-" (meaning away from) and "dictus" (meaning said or declared) and the suffix "-ically" (meaning in a manner). The word describes a manner of stating something that is clearly established or beyond doubt, as if it has been definitively declared away from uncertainty.
Think of something that is 'clearly declared' ('dictus') and 'away from doubt' ('apo-') — that's why apodictically means stating something in a way that is undeniably true.