noun
A colloquial or slightly old-fashioned word for 'head', often used in casual speech or in set phrases. More common in some dialects or in expressions like 頭が高い (to be arrogant). The standard word is 頭 (あたま).
つむりをかく。
Scratch one's head.
あの人はつむりが高い。
That person is arrogant (literally: has a high head).