Your instinct is correct! "I am not comfortable after eating these peaches" sounds unnatural because "comfortable" usually refers to physical ease, relaxation, or a lack of discomfort in a general sense (e.g., "This chair is comfortable" or "I don't feel comfortable in crowds"). More Natural Alternatives: ✅ "I don't feel good after eating these peaches." (Casual and commonly used) ✅ "I don't feel well after eating these peaches." (Grammatically correct, slightly more formal) ✅ "I feel sick after eating these peaches." (If you feel unwell) ✅ "These peaches upset my stomach." (If it’s digestive discomfort) Tip: - Use "comfortable" for things like seating, clothing, or situations ("I'm not comfortable speaking in public"), but for health or digestion, use "good," "well," or "sick." - If you're talking about an allergic reaction, you could say: "I think these peaches don’t agree with me." (A natural idiom for food intolerance)

Your intuition is correct; the sentence "I am not comfortable after eating these peaches" sounds unnatural in this context. The term "comfortable" typically refers to physical ease or relaxation, such as sitting in a cozy chair. When describing a negative physical reaction after eating, it's more appropriate to use terms like "I don't feel good" or "I don't feel well." These expressions effectively convey discomfort or unease following consumption.

It's a rare usage but it sounds fine to native speakers. It means their tummy feels funny and they may need to run to the toilet soon. Your suggestions are more explicit, and mean practically the same thing, but have a slightly more severe implication, like you might become sick and die, so people will be a bit more worried if you speak like that. For this reason, some people prefer to use 'comfortable' so as not to make people worry too much.

The word "comfortable" is sometimes used to describe unease after eating. It can be used as below: I do not feel comfortable after eating these peaches. Or I feel uncomfortable after eating these peaches. It may mean that the person is feeling bloated, nauseous, or another feeling that leaves them uncomfortable. You can also say: I feel odd after eating these peaches. I agree with your last two sentences.