Spell is a versatile English word with multiple meanings:
1. As a verb: to name or write the letters of a word in order
2. As a noun: a magical formula or incantation
3. As a noun: a period of time (e.g. a cold spell)
4. As a verb: to signify or mean something
5. As a noun: a turn of work or duty
6. As a verb: to relieve someone from work temporarily