Looking or sounding delicious and making you want to eat; appealing to the appetite (British spelling).
From appetite + -ising (British -ise suffix). Appetite comes from Latin appetitus (desire for), from appetere (to strive toward).
Food companies spend billions making things 'appetising' because the visual cortex of your brain literally can't tell the difference between looking at food porn and real food—your mouth waters at a photo the same way it does at a meal.
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