the shower
In Italian, 'the shower' is translated as 'la doccia'. It is a common word used in daily life when referring to bathing. It's pronounced as la do-cha. For example, 'I'm going to take a shower' can be translated as 'Vado a fare una doccia'.
I am using the shower
This sentence uses the present continuous tense, to describe an action that's happening now. Note that while in English we say 'using the shower', in Italian we say 'using the shower'.
After the gym, I always take a shower
This sentence combines 'dopo' (after) with a noun (la palestra) and then continues with an action (prendo la doccia). Also note the use of 'sempre' which means 'always'.
The shower in my hotel is very comfortable
This sentence uses the noun 'la doccia' within a longer phrase, expressing opinion about the comfort of the shower. The adjective 'comfortevole' is used to describe the noun 'doccia'.