biết ơn
ɹuː2 su5eɜka5khaʔaɜba2khu2n ɹuːsjuːk kɒəpkʌn tə fiːl ɡɹeɪtfəl bʌt biː aɪ letəənuenɡiːbiːef tiː ɒn ɪz mɔː diːpli fɛlt
In Thai รู้สึกขอบคุณ (rúu-sèuk khɔ̀ɔp-khun) - to feel grateful, but 'biết ơn' is more deeply felt.
Feeling grateful and appreciative for something someone has done or for an act of kindness.
Example
"Tôi rất *biết ơn* sự giúp đỡ của bạn."