Seeing two viewpoints, or two presentations of the same material, in different orders, may help you understand what is meant. When and where words are still hard to follow, another book or person gives a second view, easier perhaps to understand. When there is difficulty with what is written, talk about the words in question with others. What is hard for you to follow may be easier for another, and vice-versa. Finally, a page of a novel or a work of fiction may take a few minutes to read while one textbook page can take several minutes or even hours to be fully understood.
Understanding takes time.
The meaning of a word or phrase may depend on how it is used or who is speaking. So look for the most appropriate or intended meaning. Several possible meanings are given in a dictionary because the everyday usage may differ from place to place and from time to time. To be precise each word, heard or spoken, should have one and only one meaning in a particular context. To be precise, a single meaning for the usage of a word or term is given or described by a sentence or two.