mild ‧ ly /ˈmaɪldli/ BrE AmE adverb
1 . slightly:
The drug is only mildly addictive.
I felt mildly depressed.
2 . to put it mildly spoken used to say that you could use much stronger words to describe something:
Losing two members of staff was unfortunate, to put it mildly.
3 . in a gentle way without being angry:
‘Of course I don’t mind,’ she answered mildly.