know-kno-gno-comgno-cogn

recognise['rekəɡnaiz] [主英国英语 ] = recognize re+cogn+ise
to know someone or something because you have seen, heard or experienced them before:
to accept that something is legal, true or important
If a person's achievements are recognized, official appreciation is shown for them
v 识别;承认，认可；意识到

例句
You have changed so much that I can hardly recognize you.
你的变化太大了，我简直认不出来了。
He has not recognized the seriousness of the present situation.
他还没有意识到目前形势的严重。
Marriage without registration is not recognized by law.
法律不承认未经登记手续的婚姻。

cognitive['kɔɡnitiv]
related to the process of knowing, understanding, and learning something
adj. 认知的，认识的

普林斯顿公开课 - 人性课程节选
And our students are probably more cognitive than many young people in our society at this point and they think deeply.
在这个时代，我们的学生大概比社会上的许多其他年轻人,更具备认知能力，他们思想深刻

cognition[kɔɡ'niʃən]
n. 认识；知识；认识能力

哈佛公开课 - 幸福课课程节选
The same with cognition and we will talk a lot about it when we talk about CBT-- Cognitive Behavioral Therapy.
认知也是如此，我们会深入讨论认知,当谈到认知行为治疗时。

cognizant['kɔɡnizənt]
adj. 审理的；已认知的

词组短语
be cognizant of 认识到…；知道…

耶鲁公开课 - 死亡课程节选
Many times when you read the dialogue, this or other dialogues by Plato, it seems as though he's fully cognizant of the objections that at least an attentive reader will raise about earlier stages of the argument.
很多时候当你阅读柏拉图的对话录,不管是这篇还是其他篇,柏拉图似乎很清楚至少有一个留心的读者,会对早期的一些观点,提出反驳意见。

incognito [in'kɔɡni:təu]
adj.
1. having one's identity concealed, as under an assumed name, esp. to avoid notice or formal attentions.
adv.
2. with the real identity concealed: to travel incognito.
n.
3. a person who is incognito.
4. the state of being incognito.
5. the disguise or character assumed by an incognito.
adj. 改名的；微行的；隐名埋姓的
adv. 隐姓埋名地
n. 匿名者；微行者

例句
He didn't want to be recognized, so he travelled incognito.
他不想被人认出，所以出行时隐瞒身分。

耶鲁公开课 - 欧洲文明课程节选
He learned Dutch-- and Dutch is a very difficult language-- in 1696, while the Turkish war went on, or one of them he went off to Western Europe incognito as an embassy soldier.
他学会了荷兰语,荷兰语是很复杂的,在1696年,当土耳其战争发生的时候,或者其中一次战争时,他以一名大使馆军人的身份匿名去了西欧

趣味单词

siege[si:dʒ] 四面楚歌
a military operation in which an army tries to capture a town by surrounding it and stopping the supply of food, etc. to the people inside
a situation in which the police surround a building where people are living or hiding, in order to make them come out
surrounded by an army or the police in a siege
being criticized all the time or put under pressure by problems, questions, etc:
to begin a siege of a town, building, etc:
to surround a building, especially in order to speak to or question the person or people living or working there
n. 围攻；包围；围城；【美】(疾病等的)长期折磨;(灾祸等的)不断袭击
vt. 围攻；包围

短语:
lay siege to
包围；围攻
坚持追求；竭力追(某人，尤指女子)
raise the siege 停止围攻；解围

例句
The insurrectionary army laid siege to the capital.
起义军围攻京城。