The problem we are faced with is that western culture has stolen God's words, and added to and taken away from the meaning in ways that are unscriptural and that we reject. When we use the same words that they use, we mean different things to what they mean, and vice versa.
When we are in some conversations with some people, we have to make decisions about which set of definitions we are going to use, and we have more flexibility than they do, because we know their definitions but they do not know ours.
When Elijah talks to those who believed in Baal, he speaks to them according to their understanding, as if Baal was a god and had conscious existence:
1Ki 18:27 And it came to pass at noon, that Elijah mocked them, and said, Cry aloud: for he is a god; either he is talking, or he is pursuing, or he is in a journey, or peradventure he sleepeth, and must be awaked.
but when Hezekiah prays to God, he speaks plainly, but even so, still feels able to say that they, according to the perception of men, were burning "gods" not firewood:
Isa_37:19 And have cast their gods into the fire: for they were no gods, but the work of men's hands, wood and stone:
and if we use fiancé or betrothed in a scriptural sense then it can mean "wife" in the scriptural sense
Mat 1:24 Then Joseph being raised from sleep did as the angel of the Lord had bidden him, and took unto him his wife:
Mat 1:25 And knew her not till she had brought forth her firstborn son: and he called his name JESUS.
But if we use "marriage" and "wife" in the sense they mean it, those terms may not be accurate to describe our situation based on scripture. As Jesus had occasion to say:
Joh 8:43 Why do ye not understand my speech? even because ye cannot hear my word.