Cupboard

google

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late Middle English (denoting a table or sideboard on which cups, plates, etc. were displayed): from cup + board.

wiktionary

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Inherited from Middle English cuppeborde, cupbord. Equivalent to cup +‎ board. Phonetic variants show that the /p/ in the original forms had assimilated to the present-day /b/ by the 16th century; the etymological spelling has, however, dominated from the 18th century.

etymonline

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cupboard (n.)

late 14c., "a board or table to place cups and like objects," from cup (n.) + board (n.1). As a type of open or closed cabinet for food, etc., from early 16c.