This is the 5031st most frequent Japanese word.
航空機
Aircraft.
Here, "航空機" is used as a noun to refer to a specific aircraft, emphasizing its attributes.
この航空機は速くて快適です。
This aircraft is fast and comfortable.
In this sentence, "航空機" represents aircraft in general, used as a subject of study and discussion.
航空機の歴史について学びましょう。
Let's learn about the history of aircraft.
The word "航空機" here refers to any aircraft as the object of the requirement for piloting.