diagonal [ dia- = across 對(duì)面的；gon = angle 角；-al a. = being“being across angles 橫跨對(duì)面角的”→]a. ① connecting two corners that are not next to each other 對(duì)角的 / A four-sided plane has two diagonal lines. 四邊形有兩條對(duì)角線。② slanting 斜的 / The ship sailed on a diagonal course across the Atlantic. 輪船取一條傾斜的航線穿過大西洋。

下面是dia-的異體di-出現(xiàn)在元音字母前的兩個(gè)例子。

diorama [ di- (dia- ) = through 通過；orama ( horama ) = sight 景 =>“a sight seen through a hole 通過小洞看到的景”→ ] n. picture that is usually looked at through a small opening 從小孔觀賞的畫片，西洋景，西洋片/ The diorama is rarely seen nowaday. 如今西洋景這玩意兒是很少見了。

dioramic a. 西洋景的

diuretic [ di- ( dia-) = through 通過；uret = urine 尿； -ic a. = tending to 易于=> “tending to let urine through 便于尿液通過的”→]n. tending to increase the flow of urine 利尿的 / The doctor prescribed his patient a diuretic receipt.醫(yī)生給病人開了一張利尿的藥方。

diuresis n. 利尿；多尿