Sorry to be a language pedant but I think Khazad is Dwarf in Dwarvish; the Sindaran word for Dwarf is Hadhod.
The Dwarfs call Moria Khazad-dum which means Dwarf Mansion. Moria is a Sindaran word for the mines that came into use after the Dwarfs woke up the Balrog about 1000 years before the War of the Ring. Not sure what Moria translates to but Mor part of it means Black so it obviously has evil undertones.
Its sad I know all this actually.