'Secretly' in the Bible

“If your brother, your mother’s son, or your son or daughter, or the wife you cherish, or your friend who is as your own soul, entice you secretly, saying, ‘Let us go and serve other gods’ (whom neither you nor your fathers have known,

and toward her afterbirth which issues from between her legs and toward her children whom she bears; for she will eat them secretly for lack of anything else, during the siege and the distress by which your enemy will oppress you in your towns.