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adumbrate v。 To represent beforehand in outline or by emblem。
advent n。 The ing or arrival； as of any important change； event； state； or personage。
adverse adj。 Opposing or opposed。
adversity n。 Misfortune。
advert v。 To refer incidentally。
advertiser n。 One who advertises； especially in newspapers。
advisory adj。 Not mandatory。
advocacy n。 The act of pleading a cause。
advocate n。 One who pleads the cause of another； as in a legal or ecclesiastical court。
aerial adj。 Of； pertaining to； or like the air。
aeronaut n。 One who navigates the air； a balloonist。
aeronautics n。 the art or practice of flying aircraft
aerostat n。 A balloon or other apparatus floating in or sustained by the air。
aerostatics n。 The branch of pneumatics that treats of the equilibrium； pressure； and mechanical properties。
affable adj。 Easy to approach。
affect v。 To act upon
affectation n。 A studied or ostentatious pretense or attempt。
affiliate n。 Some auxiliary person or thing。
affirmative adj。 Answering yes； to a question at issue。
affix v。 To fasten。
affluence n。 A profuse or abundant supply of riches。
affront n。 An open insult or indignity。
afire adv。 & adj。 On fire； literally or figuratively。
afoot adv。 In progress。
aforesaid adj。 Said in a preceding part or before。
afresh adv。 Once more； after rest or interval。
afterthought n。 A thought that es later than its appropriate or expected time。
agglomerate v。 To pile or heap together。
aggrandize v。 To cause to appear greatly。
aggravate v。 To make heavier； worse； or more burdensome。
aggravation n。 The fact of being made heavier or more heinous； as a crime ； offense； misfortune； etc。
aggregate n。 The entire number； sum； mass； or quantity of something。
aggress v。 To make the first attack。
aggression n。 An unprovoked attack。
aggrieve v。 To give grief or sorrow to。
aghast adj。 Struck with terror and amazement。
agile adj。 Able to move or act quickly； physically； or mentally。
agitate v。 To move or excite （the feelings or thoughts）。
agrarian adj。 Pertaining to land； especially agricultural land。
aide…de…camp n。 An officer who receives and transmits the orders of the general。
ailment n。 Slight sickness。
airy adj。 Delicate； ethereal。
akin adj。 Of similar nature or qualities。
alabaster n。 A white or delicately tinted fine…grained gypsum。
alacrity n。 Cheerful willingness。
albeit conj。 Even though。
albino n。 A person with milky white skin and hair； and eyes with bright red pupil and usually pink iris。
album n。 A book whose leaves are so made to form paper frames for holding photographs or the like。
alchemy n。 Chemistry of the middle ages； characterized by the pursuit of changing base metals to gold。
alcohol n。 A volatile； inflammable； colorless liquid of a penetrating odor and burning taste。
alcoholism n。 A condition resulting from the inordinate or persistent use of alcoholic beverages。
alcove n。 A covered recess connected with or at the side of a larger room。
alder n。 Any shrub or small tree of the genus Alumnus； of the oak family。
alderman n。 A member of a municipal legislative body； who usually exercises also certain judicial functions。
aldermanship n。 The dignity； condition； office； or term of office of an alderman。
alias n。 An assumed name。
alien n。 One who owes allegiance to a foreign government。
alienable adj。 Capable of being aliened or alienated； as lands。
alienate v。 To cause to turn away。
alienation n。 Estrangement。
aliment n。 That which nourishes。
alkali n。 Anything that will neutralize an acid； as lime； magnesia； etc。
allay v。 To calm the violence or reduce the intensity of； mitigate。
allege v。 To assert to be true； especially in a formal manner； as in court。
allegory n。 The setting forth of a subject under the guise of another subject of aptly suggestive likeness。
alleviate v。 To make less burdensome or less hard to bear。
alley n。 A narrow street； garden path； walk； or the like。
alliance n。 Any bination or union for some mon purpose。
allot v。 To assign a definite thing or part to a certain person。
allotment n。 Portion。
allude v。 To refer incidentally； or by suggestion。
allusion n。 An indirect and incidental reference to something without definite mention of it。
alluvion n。 Flood。
ally n。 A person or thing connected with another； usually in some relation of helpfulness。
almanac n。 A series of tables giving the days of the week together with certain astronomical information。
aloof adv。 Not in sympathy with or desiring to associate with others。
altar n。 Any raised place or structure on which sacrifices may be offered or incense burned。
alter v。 To make change in。
alteration n。 Change or modification。
altercate v。 To contend angrily or zealously in words。
alternate n。 One chosen to act in place of another； in case of the absence or incapacity of that other。
alternative n。 Something that may or must exist； be taken or chosen； or done instead of something else。
altitude n。 Vertical distance or elevation above any point or base…level； as the sea。
alto n。 The lowest or deepest female voice or part。
altruism n。 Benevolence to others on subordination to self…interest。
altruist n。 One who advocates or practices altruism。
amalgam n。 An alloy or union of mercury with another metal。
amalgamate v。 To mix or blend together in a homogeneous body。
amateur adj。 Practicing an art or occupation for the love of it； but not as a profession。
amatory adj。 Designed to excite love。
ambidextrous adj。 Having the ability of using both hands with equal skill or ease。
ambiguous adj。 Having a double meaning。
ambitious adj。 Eagerly desirous and aspiring。
ambrosial adj。 Divinely sweet； fragrant； or delicious。
ambulance n。 A vehicle fitted for conveying the sick and wounded。
ambulate v。 To walk about
ambush n。 The act or state of lying concealed for the purpose of surprising or attacking the enemy。
ameliorate v。 To relieve； as from pain or hardship
amenable adj。 Willing and ready to submit。
Americanism n。 A peculiar sense in which an English word or phrase is used in the United States。
amicable adj。 Done in a friendly spirit。
amity n。 Friendship。
amorous adj。 Having a propensity for falling in love。
amorphous adj。 Without determinate shape。
amour n。 A love…affair； especially one of an illicit nature。
ampere n。 The practical unit of electric…current strength。
ampersand n。 The character &； and。
amphibious adj。 Living both on land and in water。
amphitheater n。 An edifice of elliptical shape； constructed about a central open space or arena。
amplitude n。 Largeness。
amply adv。 Sufficiently。
amputate v。 To remove by cutting； as a limb or some portion of the body。
amusement n。 Diversion。
anachronism n。 Anything occurring or existing out of its proper time。
anagram n。 The letters of a word or phrase so transposed as to make a different word or phrase。
analogous adj。 Corresponding （to some other） in certain respects； as in form； proportion； relations。
analogy n。 Reasoning in which from certain and known relations or resemblance others are formed。
analyst n。 One who analyzes or makes use of the analytical method。
analyze v。 To examine minutely or critically。
anarchy n。 Absence or utter disregard of government。
anathema n。 Anything forbidden