noun
A loanword from English, used similarly to refer to someone socially awkward and obsessively interested in intellectual or niche pursuits. Often carries a slightly negative or self-deprecating tone, but can also be used lightheartedly.
彼はコンピューターに詳しいナードだ。
He's a computer nerd.
ナードっぽい趣味を持っている。
I have nerdy hobbies.