At that time, they look them up in a dictionary with the idea of learning the precise meaning of the word, its pronunciation, and relationship between its word elements and its meaning. Some people concentrate on learning a word a day. They try to use it verbally and in writing at least once during the day. Others create flash cards and review them periodically. On your journey toward a more powerful vocabulary.
Words are the coins making up the currency of sentences. . . .
Suit the action to the word, the word to the action. You can learn words and their prefixes, roots, and suffixes more efficiently by using the principle of association to your advantage. To provide such a context, you need to create a personal connection between the word element, particularly the root, and its meaning. I actually learned the meaning of that word by associating it with the word's prefix and root. Why, I hurl my head down in sadness.