spellwork

The English word “spellwork” has 2 meanings listed here.

noun

Any magical practice involving creating or casting spells, especially new enchantments or spells which are intricate or complex.
The formula or formulation of one or more spells or enchantments; the individual parts constituting such a formulation; the inner workings or structure of a spell.

From spell + work.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.