This is the 1908th most frequent Japanese word.
落ちる
To fall, drop, or fail.
The word '落ちる' is used in its literal sense to describe the action of an object falling down from a higher position.
リンゴが木から落ちる。
The apple falls from the tree.
Here '落ちる' metaphorically means 'to fail' in the context of exams or evaluations.
試験に落ちると悲しいです。
Failing an exam is sad.
In this sentence, '落ちる' describes the disappearance or loss of something, such as a signal or connection.