'Pantry' is the 'bread room' — from Latin 'panis' (bread), kin to 'companion' (one who shares bread).
A small room or cupboard in which food, crockery, and cutlery are kept.
From Anglo-Norman 'panetrie' (bread store, bread room), from Old French 'paneterie' (bread supply office), from 'panetier' (bread server, officer in charge of bread), from Medieval Latin 'panataria' (bread room, bread store), from Latin 'panis' (bread), from PIE *peh2- (to feed, to protect, to nourish, to guard). This PIE root produced a remarkable semantic cluster: Latin 'pascere' (to feed, to graze — pasture, pastor), and Latin 'panis' (bread — companion, company, meaning literally 'one who shares bread with'). The English word 'companion' is thus a cousin
'Pantry,' 'companion,' and 'company' all come from Latin 'pānis' (bread). A pantry stores bread. A 'companion' is 'com-pānis' — one who shares bread with you. A 'company' is a group that breaks bread together. And 'pannier' (a bread basket, later any basket) carries the bread. Sharing bread has been the foundation of human