'snacky' originates from English, specifically the word 'snack' with the suffix '-y', where '-y' meant 'characterized by'.

'snack' changed from Middle English word 'snacche' (a bite or morsel) and later became the modern English word 'snack'; the adjective 'snacky' was formed by adding the productive suffix '-y'.

Initially, 'snack' meant 'a small bite or morsel'; over time it broadened to mean 'a light meal or small amount of food', and 'snacky' developed to mean 'suitable or appealing as a snack' and, by extension, 'bite-sized or easily consumable'.