Just like in English, we can describe things in Japanese by placing an adjective before them. Japanese has two types of adjectives: i adjectives and na adjectives.
Without getting into too much detail, an i adjective ends in the character i, and a na adjective usually ends in a character other than i.
The adjective atatakai “warm” ends in an i character and is an i adjective. i adjectives are nice and simple to use: just add them right before a noun to describe whatever it is you’re talking about.
While we’re on the subject of describing things, let’s take a look at how to describe things with na adjectives too. For na adjectives, we need to add the character na before the noun we want to describe.
The word suki “like” is a na adjective, so to say “like drink” or, more naturally, “the drink (I) like,” you can say suki na nomimono.
The lesson says na adjectives usually don't end in i, but the example used is suki. So what makes suki a na adjective instead of i? What makes any word ending in i a na adjective? And can you give some examples of na adjectives that don't end in i?