nerdy

UK: /ˈnɜːdɪ/ US: (nûr′dē)

Inflections of 'nerdy' (adj):

nerdier

adj comparative

nerdiest

adj superlative

WordReference Random House Unabridged Dictionary of American English © 2025

nerd•y  (nûr′dē), adj., nerd•i•er, nerd•i•est. 

1. Slang Terms, of or like a nerd.

• nerd + -y¹ 1975–80

WordReference Random House Learner's Dictionary of American English © 2025

nerd /nɜrd/   n. [countable] [Slang.]

1. Slang Terms a socially backward person, esp. one preoccupied with intellectual matters or with technology:
   a computer nerd.

nerd•y, adj., -i•er, -i•est: 

She thought the boy's glasses were nerdy.

WordReference Random House Unabridged Dictionary of American English © 2025

nerd  (nûrd), n. [Slang.]

1. Slang Terms a stupid, irritating, ineffectual, or unattractive person.
2. Slang Terms an intelligent but single-minded person obsessed with a nonsocial hobby or pursuit:
   a computer nerd.

Also, nurd. 

• obscurely derived expressive formation 1960–65, American.