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cupboard

cupboard /ˈkʌbɚd/ noun
plural cupboards
cupboard
/ˈkʌbɚd/
noun
plural cupboards
Britannica Dictionary definition of CUPBOARD
[count]
: a piece of furniture used for storage that has doors and contains shelves see picture at kitchen
US : a small room with shelves where you keep cups, dishes, or food
British : a small room where things are stored : closet

skeleton in the/your cupboard

see 1skeleton