Adjectives
An adjective is an independent part of speech that indicates the object feature and answers the questions какой? (which one?) чей? (whose?)
There are three types of adjectives in Russian:
Qualitative/Descriptive
веселый (веселее, самый веселый)
Possessive
мамин, заячий
Relative
деревянный
The difference between qualitative and relative adjectives is in the row of features. For instance, unlike the relative adjectives, qualitative ones have the comparison degrees (быстрый - быстрее) and short forms (добрый - добр); they can combine with adverbs (необыкновенно быстрый), form complex adjectives (быстрый-пребыстрый), form adjectives with the prefix -не (небыстрый); they can have antonyms (быстрый - медленный) and synonyms (быстрый, молниеносный, немедленный), diminutive forms (быстренький), and form adverbs with the endings -о, -е (быстро).
Comparison degrees
Qualitative adjectives have three comparison degrees: positive, comparative and superlative.
Positive - веселый (merry)
Comparative - веселее, более веселый (merrier)
Superlative - самый/наиболее веселый (the merriest)
As you can see, in the positive degree, the adjective is just as it’s given in the dictionary. To form the comparative degree, add the ending -ей, -ее, -е или -ше (быстрый - быстрее, сильный - сильней, высокий - выше, тихий - тише). Or you can add the word более/менее to the positive degree.
To form the superlative degree, add the word самый or наиболее/наименее to the positive degree.