nerd 
/ˈnɚd/ noun
plural nerds /ˈnɚd/ noun [count] informal + usually disapproving 1 : a person who behaves awkwardly around other people and usually has unstylish clothes, hair, etc.
▪ He dresses like a nerd. 2 : a person who is very interested in technical subjects, computers, etc.
▪ My brother is a computer nerd. [=geek] ▪ a grammar nerd
▪ He dresses like a nerd.
▪ My brother is a computer nerd. [=geek] ▪ a grammar nerd
— nerd·i·ness /ˈnɚdinəs/ noun [noncount]
▪ She was embarrassed by her sister's nerdiness.
/ˈnɚdinəs/ noun [noncount] ▪ She was embarrassed by her sister's nerdiness.
— nerd·ish /ˈnɚdɪʃ/ adjective [more nerdish; most nerdish]
▪ a nerdish teenager
/ˈnɚdɪʃ/ adjective [more nerdish; most nerdish] ▪ a nerdish teenager
— nerdy /ˈnɚdi/ adjective, nerd·i·er; nerd·i·est [also more nerdy; most nerdy]
▪ She wears nerdy glasses. ▪ He plays a nerdy scientist in the movie.
/ˈnɚdi/ adjective, nerd·i·er; nerd·i·est [also more nerdy; most nerdy] ▪ She wears nerdy glasses. ▪ He plays a nerdy scientist in the movie.
