胃がむかむかする。

胃がむかむかする。

I'm afraid I have an upset stomach.

胃(い)がむかむかする。

I ga mukamukasuru.

胃 (い)

stomach; Chinese "stomach" constellation (one of the 28 mansions)

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

むかむか (むかむか)

feeling sick; feeling queasy; feeling nauseated; being angry; being offended; being disgusted

Reading: イ

Meanings: stomach, paunch, crop, craw