The word for shower in Spanish is **ducha** . Here is a step-by-step tutorial on how to say shower in Spanish:

1. Start by saying "Yo necesito tomar una ducha" which means "I need to take a shower" .
2. If you want to say "I am taking a shower", you can say "Estoy tomando una ducha" .
3. If you want to ask someone if they have taken a shower, you can say "¿Tomaste una ducha?" which means "Did you take a shower?" .

I hope this helps!