Used in specific compounds and set phrases, such as 頭が高い (arrogant, haughty). Not the general word for 'head' (which is あたま).
See also: 頭が高い
The expression 頭が高い means that someone's attitude is arrogant.
head; brains; mind · intellect; intelligence; understanding
overhead; above one's head
cloth headgear; hood; kerchief; cap · tokin (yamabushi headgear)
cranium; skull
horse-headed demon (in hell)
watch crown; stem · canon (of a bell) · dragon-head shape; dragon-head crest
ox-headed demon
nine-headed dragon
dried aconite root; monkshood
thinly sliced salmon head cartilage
halo (of a Buddhist statue); nimbus
rush of blood to the head
heavy-headed; haughty
ascetic practices; self-mortification · religious mendicancy; mendicant monk · sack; carry-all bag
Yama's pole with a human head on top
zunari helmet; head-shaped helmet
head pivot throw
head-butt; head-butting
filhós; Portuguese-style fried dough ball · deep-fried tofu ball with vegetables
Standard kanji spelling for this reading.
Kana spelling is sometimes used, especially in informal writing or when the kanji is considered difficult.
The reading ず is a Sino-Japanese reading (on'yomi) of the kanji 頭. It is not productive in modern Japanese outside of a few fixed expressions.