expression, godan verb (-ru)
hear about; come to one's knowledge; learn of (by chance)
Describes information reaching someone, often unexpectedly or indirectly. The subject is the information or rumor, not the person.
その噂は彼の耳に入った。
The rumor reached his ears.
新しいプロジェクトの話が耳に
I heard about the new project (it came to my knowledge).
expression, godan verb (-ru)
enter one's ears (e.g. water)
Literal physical sense: something (water, insect, etc.) gets into the ear. Less common than the figurative sense.
プールで耳に水が入った。
Water got into my ear at the pool.