Learn how to say My Goodness correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word goodness:
1the quality of being good:
a belief in the basic goodness of mankind
2the beneficial or nourishing element of food.
(as a substitution for ‘God’) expressing surprise, anger, etc.:
goodness knows why she didn’t go herself
my goodness, you gave me quite a fright!
for goodness’ sake
goodness of fit
Statistics the extent to which observed data matches the values expected by theory.
have the goodness to do something
used in exaggeratedly polite requests:
have the goodness to look at me when I’m speaking to you
Old English gōdnes (see good, -ness)