(Hebrew נפלים) Translated in the Bible as "giants," but actually derived from נפל, "abortion; fall; dud; to fail, to die, to be conquered."
"There were giants [נפלים] in the earth in those days..." - Genesis 6:4
"The land, through which we have gone to search it, [is] a land that eateth up the inhabitants thereof; and all the people that we saw in it [are] men of a great stature. And there we saw the giants [נפלים], the sons of Anak, [which come] of the giants [נפלים]: and we were in our own sight as grasshoppers, and so we were in their sight." - Numbers 13
The term Nephilim has several interrelated meanings:
1. fallen angels or masters, who were "giants among men" but fell, becoming demons.
2. the Lemurian race, when the expulsion from Eden occured