This is the 3592nd most frequent Chinese word.
牙
"牙" means "tooth" or "fang" in English.
The word '牙' refers to a tooth, and here it's part of the noun phrase '牙齿' (tooth), indicating a physical tooth.
我的牙齿很痛。
My tooth hurts a lot.
The word '牙' denotes relation to teeth in '牙刷' (toothbrush), a compound noun.
他的牙刷很好用。
His toothbrush works very well.
The word '牙' metaphorically describes something with a toothed edge or pattern here, referencing the structure or shape of teeth.