Mucho – a lot
Poco – a little
⇒ Eva canta mucho. Yo canto poco. (Eva sings a lot. I sing a little.)
Note: Mucho and poco can work as adjectives. In that case they mean many/a lot of or few/not many (for countable nouns) or much/a lot of or little (for uncountable nouns) respectively. When they are adjectives, they need to match the noun’s gender and number.
⇒ Hay muchas ventanas en mi sala. Hay pocos supermercados en Midtown. (There are many windows in my living room. There are few/not many supermarkets in Midtown.)
