词根：sever = serious
来源于拉丁语的sever 意为 serious,earnest,to cut。
同源词：
1. asseverate（使变得非常深刻和严肃 as<ad(=to,intensive) + sever(=serious)）
vt.断言
asseveration n.断言
The professor asseverated that more than half the students had cheated. 教授断言一半以上的学生都作弊了。
2. persevere（从头到尾始终非常严肃 per(through,throughout) + sever(=serious)）
vi. in + sth 坚持不解；（辩论中）固执已见
perseverance n.忍耐，坚持
persevering adj.有毅力的,锲而不舍的；固执的
It's important to persevere,especially when you feel like quitting. 坚持不解很重要，尤其是当你想放弃的时候。
3. severe
adj.严重的；剧烈的；严格的，苛刻的 *sever(=serious)
4. dissever
v.（使）分离；（使）分裂 *dis(=away),sever(=cut)
5. sever
v.切断，割断；中断；断绝；（使）分隔，（使）分离 *sever (=cut)
6. severance
n.割断，断绝；分离，隔离 *sever(=cut)
severance payment 解雇金，离职金
severance of diplomatic relations/of communications 断绝外交关系/通信中断
词根词缀：demi-
【来源及含义】Latin: half
【同源单词】demibastion, demigod, demigoddess, demilitarization, demilitarize, demilune
词根词缀：hemi-
【来源及含义】Greek: half
【同源单词】hemialgia, hemianalgesia, hemianesthesia, hemianopsia, hemianoptic, hemiatrophy
词根词缀：pro-, por-, pur-
【来源及含义】Greek > Latin: a prefix signifying before; forward, forth; for, in favor of; in front of; in place of, on behalf of; according to; as, to place before; to go before or forward, to throw forward
【相关词根词缀】 Related before-word units: ante-; antero-; anti-; pre-.
【同源单词】portend, portent, portentous, portentously, portentousness, pro
词根词缀：semi-
【来源及含义】Latin: half, partly, twice
【同源单词】semi-acid, semi-amplexicaul, semiannual, semiannually, semiaquatic, semiarid
词根词缀：sesqui-
【来源及含义】Latin: one and a half; normally used as a prefix; from Latin, semis “half” + que “and”
【相关描述】In chemistry, three atoms or equivalents of the [specified] element or radical are combined with two of another, as in iron sesquioxide, Fe 2O3. Also defined as the proportion of two (of one radical or element) to three (of another).
【同源单词】hippopotomonstrosesquipedalian, hippopotomonstrosesquipedalianism, hippopotomonstrosesquipedalianist, hippopotomonstrosesquippedaliophobia, hyperpolysyllabicsesquipedalianist, sesquialteral