前綴 tri-

漢： 前綴tri-來源於拉丁語，意爲“three”表示“三”，關於數字“三”的這個前綴，有的書上也把它儅作詞根來記，可以看一下從數字三開始了解英詞滙記憶的奧秘這篇文章。tri與three之間發生元音音變，和"h"的弱化，由three變成了tri.
英：word-forming element meaning "three," from L. tres (neuter tria) or Gk. treis (neuter tria) "three" (see three).
1.tricycle
n.three-wheeled bicycle 三輪車 cycl=wheel
Tricycle were much more common than bicycles in the 1800's
在19世紀，三輪車比自行車常見的多

2.tripod
n.three-legged support,eg,for acamera;stool,table,etc.resisting on three legs 照相機等的三腳架；三腳桌，tri=three,pod=foot
Set the camera on a tripod so there is no shaking during exposure.
把照相機放在三腳架上，可防止曝光時相機抖動。
3.trisect
v.divide a line,an angle etc,into three parts 三（等）分
sect=cut tri=three
We trisected the pie,one section for each of the three of us.
我們平均把餡餅分成了三分，每人一份。