underside

1 ENTRIES FOUND:
underside /ˈʌndɚˌsaɪd/ noun
plural undersides
underside
/ˈʌndɚˌsaɪd/
noun
plural undersides
Britannica Dictionary definition of UNDERSIDE
1 
[count] : the bottom side or part of something
2 
[singular] : a part of life, a city, etc., that is hidden and usually unpleasant