ppoi = ish
Add ppoi to nouns and adjectives to easily turn any them into other words. For example. In America when we want to say something has style we might say it is stylish, (all we do there is add the ish)
or technically that it bears strong resemblance of the noun style. Or that it pertains or bears an air of the noun.
In Japanese we use
noun+ ppoi, or
adjective + ppoi
You could think of it this way, pretend you are in Hawaii dipping your words in poi and your word will come out looking like the thing you dipped it in.
Its similiar to the -ly of adverbs.
If we want to say the car is sluggish add ppoi to the end of the word osoi - or slow making it osoppoi. Just like in English where we can stick ish on the tail end of just about any word, we can do the same in Japanese by adding ppoi.
Towards Better Japanese Ganbatte ne! Do Your Best! Makurasuki