词根：-alt-

【词根含义】：高

【词根来源】：来源于拉丁语形容词alt.us, alt.a, alt.um(高的)。

【同源单词】：altar, altimeter, altimetry, altitude, exalt

前缀：e-, ex-

【词根含义】：出,向外;向上

【词根来源】：e-用在b, c, d, g, j, l, m, n, r, v前;ex-用在s前时,s常省略。来源于拉丁语前缀ex-。

【同源单词】：edit, edition, editor, editorial, educate

词根词缀：alto-, alt-, alti-

【来源及含义】Latin: high, highest, make high; tall, lofty

【同源单词】Ab alio expectes, Alta pete, altar, altar, altazimuth, altigraph

词根词缀：ex-, e-, ef-

【来源及含义】Latin: a prefix occurring in words of Latin origin used in the senses: out, out of, from; upward; completely, entirely; to remove from, deprive of; without; former [said of previous holders of office or dignity]

【相关描述】Before f, ex- becomes ef-; before all voiced consonants (as b, d, g, etc.) ex- becomes e-.

【同源单词】e pluribus unum, educate, educe, efface, effacement, effete