Etymology is the study and knowledge of word origins.
This can include history, usage, alternate meanings, and coined words or phrases.
Some examples were provided in this post regarding the Spanish word
para meaning
stop.
Updated Grammar and Vocabulary.
Another word is
breakfast which means to stop fasting. Actually, falling asleep at night and not eating is not actually fasting. It means to make your body lighter, less bloated, and more agile. It can lead to long term changes in eating patterns.
Word etymology helps with better understanding professional vocabularies because, its more apparent how a word is used and why. Knowing etymology is also useful in keeping up with conversations that have lots of coined words or phrases.
Professional vocabularies often assume that persons involved in a conversation are familiar with etymology. This is because many professionals like to study and have a bit of scholarly expression.
A good tip for learning word origins, meaning and usage is to do it during off time because vocabularies often change between regions, work groups, living areas, settings such as professional, casual, academic, athletic, leisurely, or friends.
In the case of breakfast, more people skip breakfast in modern times because they often don't go to bed hungry, and they don't require much energy until later on in the day.