在线common roots课程其他-中国考试

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dec/a,-ten; decade - 10 years; decathlon - athletic contest that includes 10 disciplines in which each participant competes; December - formerly the 10th month of the Roman calendar

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deci-one tenth; deciliter - a tenth of a liter; decimate - reduce dramatically; decibel - one tenth of the sound volume unit bel

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dem/o-people; democracy - government of the people; demographic - the study of people; epidemic - spreading among people in a region

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demi-half, less than; demitasse - a small cup of coffee; demimonde - someone of little respected life style

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dendr/o/i-tree; philodendron - a climbing plant that grows on trees; dendrochronology - dating events by studying growth rings in trees; dendriform - in the shape of a tree

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dent, dont-tooth; dental - relating to teeth; dentist - a doctor for the teeth; dentures - a set of false teeth

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derm/a-skin; dermatologist - a doctor for the skin; pachyderm - a class of animals with very thick skin (elephant, rhinoceros); dermatitis - inflammation of the skin

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di/plo-two, twice; dichromatic - displaying two colors; diploma - a certificate, literally "a letter folded double"; dilemma - a situation that requires a choice between two alternatives.

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di/s-apart, away, ; digression - a departure from the main issue, subject; disappear - to move out of sight; dissect - to cut apart piece by piece.

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dia-through, between, ; diabetes - disease characterized by excessive thirst and discharge of urine; diagnosis - understanding a condition by going through a detailed review of symptoms; dialog - conversation between two people.

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dict-speak; contradict - to express the opposite of; prediction - a statement foretelling the future; dictate - to speak out loud for another person to write down.

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domin-master; dominate - to be the master of; domineering - excessively controlling; predominate - to have more power than others

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don/at-give; donation - a contribution or gift; donor - someone who gives something; pardon - to give forgiveness for an offense

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duc/t-lead; conduct - to lead musicians in playing music; educate - to lead to knowledge; deduction - a subtraction of an amount.

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du/o-two, twice; duplicate - make an identical copy; duet - a musical composition for two voices or instruments; duo - a pair normally thought of as being together.

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dur-harden, to last, lasting; durable - having the quality of lasting; duration - the length of time something lasts; enduring - able to last.

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dyn/a/am-power, energy, strength; dynamo - a generator of energy; dynamic - having physical energy/power; dynamite - a powerful explosive.

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dys-abnormal, bad; dyspepsia - abnormal digestion; dystopia - an imaginary place of total misery; dyslexia - impairment of the ability to handle words.

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e -out, away; eloquent - speaking beautifully and forcefully; emissary - a representative of a country or group sent on a mission; eject - throw out forcefully.

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ego-self; egoistic - self-centered; alter ego - a higher aspect of oneself; egomania - excessive preoccupation with oneself.

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