When we see an unknown word in one text, the first thing we should do is check the meaning of the word in a dictionary. After that, we should memorize the word and try to use it in a certain context, in order to make sure we understood its meaning.
When we are predicting the meaning of the word, we can often make a mistake, because some words and their meanings can be quite unpredictable or illogical if someone doesn't know the etymology of the word or doesn't understand the scope of its use.
In the story The Lesson by Toni Cade Bambara, the author described the items of focus as un needed objects and items that could have been fine with out. He also mentioned then in The Life Lessons also another book by Toni Cade Bambara that there was the same problem.