sever = serious

來源于拉丁語的sever 意為 serious,earnest,to cut。

1.asseverate（使變得非常深刻和嚴肅 as<ad(=to,intensive) + sever(=serious)）
vt.斷言
asseveration n.斷言
The professor asseverated that more than half the students had cheated. 教授斷言一半以上的學生都作弊了。

2.persevere（從頭到尾始終非常嚴肅 per(through,throughout) + sever(=serious)）
vi. in + sth 堅持不解；（辯論中）固執(zhí)已見
perseverance n.忍耐，堅持
persevering adj.有毅力的,鍥而不舍的；固執(zhí)的
It's important to persevere,especially when you feel like quitting. 堅持不解很重要，尤其是當你想放棄的時候。

3.severe
adj.嚴重的；劇烈的；嚴格的，苛刻的 *sever(=serious)

4.dissever
v.（使）分離；（使）分裂 *dis(=away),sever(=cut)

5.sever
v.切斷，割斷；中斷；斷絕；（使）分隔，（使）分離 *sever (=cut)

6.severance
n.割斷，斷絕；分離，隔離 *sever(=cut)
severance payment 解雇金，離職金
severance of diplomatic relations/of communications 斷絕外交關系/通信中斷