Adjectives describe things. Here are the most common examples:
Colors - black, blue, white, green, red
Sizes - big, small, large, thin, thick
Shapes- triangular, round, square, circular
Qualities- list: good, bad, mediocre
Personality - happy, sad, angry, depressed
Time - Yearly , monthly, annually
Ages - new, young, old, brand-new, second-hand
Sound related Adjectives - loud, noisy, quiet, silent
Touch related Adjectives - muddy, slippery, sticky
Taste related Adjectives - list: juicy, sweet,sour