Here's another example of confusion between parts of speech--in this case, the verb to relax and the noun relaxation (uncountable).
Polish students often say that something--a vacation, a day in the pool--is a wonderful relax. However, we cannot use relax as a noun in English. We need the noun form: relaxation. Still, we cannot say that something is a wonderful relaxation, because the noun is uncountable and thus a relaxation is incorrect. Normally, then, we say something is a wonderful form of relaxation.
To relax is a regular verb. We say I relax, you relax, she/he/it relaxes, adding an extra syllable for the -es ending. The other forms are relaxing and relaxed (the -ed ending is NOT pronounced as a separate syllable). We can also use relaxed as an adjective.
Here are some examples of sentences we might use:
You work too hard. You need to relax more.
He has a very relaxed way of teaching, so nobody gets too stressed.
For me, reading is the best form of relaxation.
John? He's relaxing out in the yard.
This is probably a good place to point out that many nouns end in -ation, such as relaxation, examination, demonstration, etc. In many cases, these nouns are associated with verbs that end in -ate, such as demonstrate (demonstration) and calculate (calculation). However, there are also many of these nouns associated with verbs that do NOT end in -ate. One example is relax/relaxation. Here are a few others: