Tartarum,took me over,whats it mean? what is it?

ok so a while ago i had a lucid dream , and in this lucid dream i SOMEHOW got the idea to say the word, ''Tartarum'' inside my head,almost instinctively,and what happend is that something completely took over me and started speaking to me,it was me,but it wasn't,it didn't say anything important,as if it was chitchatting me,
however,whenever i said this word,it would trigger and it would happen all over again,
it happend 5-6 times , so much so that when i woke up i was too scared to think up the word , i was scared it would take over again.
i searched around for the meaning of this word but apprently its meaningless,
anyone have any simmilar experiances or could possibly know what this is?
yesterday i tried thinking it inside another lucid dream but a dream character told me its evil and i shouldn't, but i dissed him and told him to fuck off,but i was too scared to say it myself so i didn't.

anyway,thx for ur help.

I sometimes have my subconscious say things as me without my consent. It's sort of like you're observing yourself as someone else speaks for you. As for the word, it wouldn't mean anything to us but because you imagined that it would have that effect, it will. Stuff like that sometimes just happens in dreams.

thanks for the reply,
i had tought as much.but the thing is,the word didn't have any meaning to me before this,its a completely new word but somehow it turns up in ancient greek,its roots are the underworld in ancient greek mythologyl.