What is the origin of word NASA?

The word "NASA" is an acronym, which stands for National Aeronautics and Space Administration. It's not a word with an independent origin, but rather a combination of existing words.

Here's a breakdown:

* National: Refers to the United States of America as a nation.

* Aeronautics: The science or art of flight, especially in heavier-than-air aircraft.

* Space: The boundless three-dimensional extent in which objects and events have relative position and direction.

* Administration: The management of an organization, typically a large one.

So, "NASA" is simply a shortened way of saying "National Aeronautics and Space Administration," which reflects the agency's purpose and scope.