Somebody earlier used an example of the word “let” as a word that means the opposite today. Do you have a specific example? I did a search on blbclassic and sure enough found lots of examples, hundreds.
Every one of them that I checked (too many to check them all) used “let” in the way we use it, as in “Let’s go.” Let us make man, etc etc.
Except the one I think that they pick on:
For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way. — 2 Thess 2:7
But see the context. The context provides the definition. It’s obvious what it means.
And it is a great reach to say it means what some prophecy interpretations I’ve heard say it mean. It’s rather clear that God (or the Holy Spirit) is holding back the Tribulation until the he lets it loose. (Not the church, folks, sorry)