You know toddlers, those little darlings aged 2-3 years old, who love to prod, poke, touch, thump and lick everything, put it in their mouths and, sometimes, spit it out again.
You know parents, they are the ones constantly saying; Leave it alone! Don’t touch it! Stop it! And apologising. A lot.
Leave it alone. The Cambridge Dictionary says it means; to not annoy, change, or touch someone or something.
Leave it alone is a phrasal verb that always needs a noun or pronoun in the middle.
Leave your sister alone, leave the dog alone, leave the plants alone, leave the insects alone, leave that alone, leave me alone.
You might also hear let it alone. And with that, I’ll leave you alone.