Enchant

ENCH'ANT, verb transitive [Latin incanto; in and canto, to sing. See [[Chant and Cant]].]

1. To practice sorcery or witchcraft on any thing; to give efficacy to any thing by songs of sorcery, or fascination.

And now about the cauldron sing,

Like elves and fairies in a ring,

Enchanting all that you put in.