来自拉丁语的merg,mers意为to dip,to plunge。
（*拉丁文mergere(=to sink,to dip),过去分词mersus。—— 英文字根字典）
同源词：
1. immerse（向内浸、浸湿im<in(=into) + mers(=dip,plunge)）
vt.sb/sth + in + sth 浸入；使深陷入；使埋首于；给...施浸礼
immersion n.沉浸；专心；浸礼 cf. immerge (=immerse)
He immersed himself in his studies to the detraction of his social life.他因埋头于学业而忽视了社交生活。
2. emerge
v.出现；浮现；（事实、想法等）显现出来 *e<ex(=out)
emergence n.显现，出现
emergent adj.显现的，出现的；新兴的
emergent countries of Africa 非洲的新兴国家
The moon emerges from behind the clouds.月亮出现在云层后面。
3. emergency
n.紧急情况，突然事件 *e<ex(=out)
emergency power 紧急备用动力
emergency exit/ fund 紧急出口/应急奖金
emergency call 紧急呼叫
emergency case/box 急救箱
emergency measures 应急措施
4. submerge
v.把...浸入水中；淹没；潜入水中 *sub(=under)
submergence / submersion 淹没，浸没
submersible adj.能潜入的
5. submerged
adj.浸没的；浸在水中的；陷于贫困的；[海]水下的；水下运行的 *sub(=under)
submerged at high tide 涨潮时被淹没的遇难船只
submerged rocks 暗礁
wreck that is submerged speed 水下行驶速度
submerged tenth 社会的最底层
6. merge
v.（使）合并；（使）渐渐消失
merger n.（公司等的）合并
mergence n.没入；消失
The small banks were merged into one large organization. 那家小银行被并入一家大机构。
His fear was gradually merged into curiosity. 他的恐惧逐渐被好奇心所代替。
7. immerge
v.浸入；使陷入（沉没其中）《im- = into》