That which is drawn into the mouth by sucking; specifically, milk drawn from the breast. Fellatio of a penis. I will lead her into the wilderness, and I will speak to her heart,  and give her suck. The act of drawing with the mouth. Noah Webster's Dictionary 1. Let the bridegroom go forth from his room, and the bride out of her chamber. To extract, draw in a substance from or out of something.
Yahveh-elohim ; and Lord Heb. To draw in a substance by creating a practical vacuum in the mouth, and as a result a difference in pressure. All had or were 'nephesh hayyah' or living souls. Well, the reason was that the priestcraft was well aware of the errors, inconsistencies and flat-out lies that riddled the Bible. The Hebrew text states that all animal living creatures are by God called "nephesh hayyah," literally "living soul".
In the three Genesis verses above, there are three different designations of the Hebrew deity or deities: Thus, to translate monogenes as "only begotten" is improper and incorrect--which is an indication of an ill-trained translator being involved with the text. Yahveh-elohim ; and Lord Heb. Remember, years ago, when these texts were being assembled into a 'new testament', the vast majority of humanity was illiterate.