This is the 9632nd most frequent Japanese word.
胃
Stomach.
In this sentence, 胃 is used to refer to the physical organ 'stomach.' It is often used in descriptive sentences like this to indicate feelings or sensations specific to the stomach area.
胃が痛いです。
My stomach hurts.
Here, 胃 is again referring to the stomach as a specific organ, but in a medical or procedural context, emphasizing its function in health.
胃の検査を受けました。
I underwent a stomach examination.
In this example, 胃 is described in terms of its 'strength,' which is a qualitative measure, often implying its tolerance or resilience compared to normal.