Questions & Answers about Izmjenjivač radi tiho.
Izmjenjivač is a noun. In this sentence, it is nominative singular, because it is the subject of the sentence.
It is also a masculine noun. You can often tell that from the consonant ending in the dictionary form.
So structurally:
- izmjenjivač = the subject
- radi = the verb
- tiho = an adverb describing how it works
Here, radi is the 3rd person singular present tense of raditi.
So:
- ja radim = I work / I am working
- ti radiš = you work
- on/ona/ono radi = he/she/it works
In this sentence, radi means something like:
- works
- operates
- is functioning
For a machine or device, radi is very natural Croatian.