YOU SAID:

He said that, to his chagrin.

INTO JAPANESE

彼は悔しそうにそう言った。

BACK INTO ENGLISH

he said regrettably.

INTO JAPANESE

彼は残念そうに言った。

BACK INTO ENGLISH

he said regretfully.

INTO JAPANESE

彼は残念そうに言った。

BACK INTO ENGLISH

he said regretfully.