IPA: /ˈhæz.ər.dəs.li/
KK: /ˈhæzərdəsli/
In a way that is dangerous or risky.
The chemicals were handled hazardously, putting everyone at risk.
Hazardously → It is formed from "hazard" (from Old French *hasard*, meaning chance or risk) and the suffix "-ous" (meaning full of) and "-ly" (meaning in a manner). The word "hazardously" means in a manner full of risk or danger.
Think of 'hazard' as representing risk or chance, and remember that 'hazardously' means doing something in a risky way.