for all of the い adjectives (like 白い [しろい] meaning 'whit | Learn Japanese

for all of the い adjectives (like 白い [しろい] meaning "white")

there are X-くない forms to them, meaning "not X"

for example

白い車 [しろいくるま] means "white car"

and

白くない車 [白くない車] means "a car that is not white"