Lexicons are commonly used for studying biblical languages. It may shock you, then, that I discourage beginning Hebrew and Greek students from using them. I’m not kidding.
I’d be happy if beginning students never used them.
I don’t diminish lexicons because they are so frequently abused, though that’s true. It also isn’t because I want people to spend hundreds of hours memorizing Hebrew and Greek vocabulary. The reason is that, for those newly initiated to Hebrew and Greek, lexicons just don’t give you much useful information.