'oniony' originates from the English word 'onion', specifically the word 'onion', where 'onion' meant 'a bulbous plant used as a vegetable'.

'onion' changed from the Old French word 'oignon' and eventually became the modern English word 'onion'.

Initially, it meant 'a bulbous plant used as a vegetable', but over time it evolved into its current meaning of 'having the characteristics of an onion'.