'Secretly' in the Bible

“If your brother, the son of your mother, or your son or daughter, or the wife you embrace, or your closest friend secretly entices you, saying, ‘Let us go and worship other gods’—which neither you nor your fathers have known,

the afterbirth that comes out from between her legs and the children she bears, because she will secretly eat them for lack of anything else during the siege and hardship your enemy imposes on you within your gates.