Definition of (り)

suffix
in (e.g. secret), with (e.g. success)(after a noun that represents a state or condition; often as 〜裏に)
See also:成功裏,  暗々裏
Other readings:
【り】
Related Kanji
back, amidst, in, reverse, inside, palm, sole, rear, lining, wrong side
reverse, inside, palm, sole, rear, lining, wrong side