好词典

tooth

UK //tuːθ//US //tuːθ//

词源

源自古英语 tōþ,与德语 Zahn同源,最终源自原始印欧语词根 *dent-(牙齿)。

noun

❶ 牙齿,指人或动物口腔中用于咀嚼食物的坚硬结构,通常呈白色,排列在上下颌骨上。

“She brushed her teeth before going to bed.”

(她睡前刷了牙。)

“The dentist found a cavity in my back tooth.”

(牙医发现我后牙有个蛀洞。)

❶ 齿状物,指物体边缘像牙齿一样排列的凸起部分,常见于工具或机械部件。

“The saw has very fine teeth for cutting wood smoothly.”

(这把锯子的细齿能让木材切割更顺滑。)

“Check the teeth of the gear for any damage.”

(检查齿轮的齿是否有损坏。)

同义词:fang, denticle, cog

verb

❶ 给某物装上齿状结构或使其具有锯齿边缘,常用于工具制造领域。

“The craftsman toothed the edge of the chisel for better grip.”

(工匠给凿子边缘开齿以增强抓握力。)

“We need to tooth this blade before it can be used.”

(我们需要给这把刀片开齿才能使用。)

同义词:serrate, notch, indent

常见短语

sweet tooth — 指特别喜欢吃甜食的偏好或习惯,形容人对甜味食物的强烈喜爱。

“My daughter has such a sweet tooth that she eats dessert first.”

(我女儿特别嗜甜,总是先吃甜点。)

tooth and nail — 全力以赴地斗争或争取,形容用尽一切手段激烈对抗的状态。

“They fought tooth and nail to protect their land.”

(他们竭尽全力保卫自己的土地。)