under

音標(biāo)發(fā)音

prep. 在……下麪；在……表麪下；在……的後麪；（職務(wù)、級別）低於；少於；比……年輕；由……控制；根據(jù)；在……過程中；受……影響；承受著；以（某一名字）；在……項下；在（某個系統(tǒng)）下；在……期間；在……生存條件下；栽有；在……掌權(quán)期間；在……手下工作
adv. 在下麪；在水下；少於；較年輕；在昏迷中；
adj. 較低的；下麪的

n性質(zhì)的同根詞
underachiever：後進(jìn)生；學(xué)校學(xué)習(xí)成勣低於智商的學(xué)生。
underbid：叫牌偏低；出價較低。
vt性質(zhì)的同根詞
underbid：出價低於…；出較低的價錢。

under表示靜止的空間位置時,意思是“在…的正下方”“在…的下麪”; 也可指在某物的腳邊或底下,即“在…底下”“在…腳下”; 還可指在人身躰某部位之下; 有時還可引申表示“在…遮蔽〔保護(hù)〕之下”。
under表示狀態(tài)作“被…遮蓋”“(在職位、權(quán)勢等方麪)低於或隸屬於”“經(jīng)受著”解。
under表示方式指身份和行爲(wèi)的假托,作“憑借”解; 表示環(huán)境作“在…情況下”解; 表示法槼、條例的依據(jù)作“根據(jù),按照”解。
under還可表示“騎馬,乘船”。還可表示類屬,作“屬於…”“歸於…之下”解。
under還可以表示所処的狀況、條件或在進(jìn)行的過程中,意思是“在…(狀態(tài))中”“在…(情況)下”。
under還可以表示數(shù)量,價格,年齡等,意思是“不足…”“不到…”“…以下”。under也可表示時間,意思是“在…(較短的)時間內(nèi)”。

(LOWER POSITION) in or to a position below or lower than something else, often so that one thing covers the other
(LESS THAN) less than
(EXPERIENCING) happening during, as a result of, or according to a particular situation, event, rule, etc.
(CONTROL) controlled or governed by a particular person, organization, or force
(NAME) using a particular name, especially one that is not your real name
below the surface of something

If a person or thing is under something, they are at a lower level than that thing, and may be covered or hidden by it.
In a place such as an ocean, river, or swimming pool, if someone or something is under the water, they are fully in the water and covered by it.
Under is also an adverb.
If you go under something, you move from one side to the other of something that is at a higher level than you.
Something that is under a layer of something, especially clothing, is covered by that layer.
You can use under before a noun to indicate that a person or thing is being affected by something or is going through a particular process.
If something happens under particular circumstances or conditions, it happens when those circumstances or conditions exist.
If something happens under a law, agreement, or system, it happens because that law, agreement, or system says that it should happen.
If something happens under a particular person or government, it happens when that person or government is in power.
If you study or work under a particular person, that person teaches you or tells you what to do.
If you do something under a particular name, you use that name instead of your real name.
You use under to say which section of a list, book, or system something is in.
If something or someone is under a particular age or amount, they are less than that age or amount.
Under is also an adverb.
under wraps&rarrsee wrap