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dent-tooth

dent[dent]
to make a hollow place in a hard surface, usually by hitting it
to damage sb's confidence, reputation, etc
a hollow place in a hard surface, usually caused by sth hitting it
if you dent something, or if it dents, you hit or press it so that its surface is bent inwards
n. 凹痕；削弱；减少；齿
vi. 产生凹陷；凹进去；削减
vt. 削弱；使产生凹痕

词组短语
make a dent 产生印象；引起注意
dent resistance 耐冲击性
make a dent in v. 削弱；[口]取得有效进展

例句
The impact dented our car's fender.
碰撞把我们汽车挡泥板给撞凹下去了。
The caustic remark dented her ego.
那种尖利刻薄的话语伤害了她的自尊心。

dental['dentəl]
connected with the teeth
Linguistics Articulated with the tip of the tongue near or against the upper front teeth
adj. 牙科的；牙齿的，牙的；齿音的

短语:
go dental [军队俚语]以牙病为借口请假

例句
I had undergone a major dental operation.
我经受了一次牙科大手术。

dentist ['dentist]
a person whose profession is dentistry.
n. 牙科医生

dentation[den'tiʃən]
1. the state or form of being dentate.
2. an angular or toothlike projection of a margin
n 齿状;齿状突起

dentition[den'tiʃən]
1. the makeup of a set of teeth including their kind, number, and arrangement.
2. the eruption or cutting of the teeth; teething; odontiasis.
n. 齿列；生齿；[脊椎] 齿系

dandelion['dændilaiən]

词汇起源
early 15c., earlier dent-de-lioun (late 14c.), from M.Fr. dent de lion, lit. "lion's tooth" (from its toothed leaves)

a common small bright-yellow wild flower which has a lot of long thin petals arranged in a circular pattern around a round centre:
n. 蒲公英