placebo: a usually pharmacologically inert preparation prescribed more for the mental relief of the patient than for its actual effect on a disorder
relief: a payment made by a male feudal tenant to his lord on succeeding to an inherited estate
distress: seizure and detention of the goods of another as pledge or to obtain satisfaction of a claim by the sale of the goods seized
drop: the quantity of fluid that falls in one spherical mass
lunes
Volcanology, CHALLENGE 7
shrouded: to cut off from view
ash: any of a genus (Fraxinus) of trees of the olive family with pinnate leaves, thin furrowed bark, and gray branchlets
roughly: in a rough manner
isolated: occurring alone or once
heartwarming: inspiring sympathetic feeling
ash: any of a genus (Fraxinus) of trees of the olive family with pinnate leaves, thin furrowed bark, and gray branchlets
roughly: in a rough manner
isolated: occurring alone or once
heartwarming: inspiring sympathetic feeling
Middle East, CHALLENGE 6
encircled: to form a circle around
razor: a keen-edged cutting instrument for shaving or cutting hair
farmers: a person who pays a fixed sum for some privilege or source of income
roughly: in a rough manner, with harshness or violence
bullets: a round or elongated missile (as of lead) to be fired from a firearm
razor: a keen-edged cutting instrument for shaving or cutting hair
farmers: a person who pays a fixed sum for some privilege or source of income
roughly: in a rough manner, with harshness or violence
bullets: a round or elongated missile (as of lead) to be fired from a firearm
Green Sahara, CHALLENGE 5
livable: suitable for living in, on, or with
axis: a straight line about which a body or a geometric figure rotates or may be supposed to rotate
surroundings: the circumstances, conditions, or objects by which one is surrounded
soil: to stain or defile morally
sipping: to drink in small quantities
axis: a straight line about which a body or a geometric figure rotates or may be supposed to rotate
surroundings: the circumstances, conditions, or objects by which one is surrounded
soil: to stain or defile morally
sipping: to drink in small quantities
Animals thinking, CHALLENGE 4
ape: one of the larger tailless or short-tailed Old World forms
odorless: a quality of something that stimulates the olfactory organ
issue: the action of going, coming, or flowing out
conceited: having or showing an excessively high opinion of oneself
surreptitiously: done, made, or acquired by stealth
odorless: a quality of something that stimulates the olfactory organ
issue: the action of going, coming, or flowing out
conceited: having or showing an excessively high opinion of oneself
surreptitiously: done, made, or acquired by stealth
Democracy, CHALLENGE 3
threshold: the plank, stone, or piece of timber that lies under a door
fuel: a material used to produce heat or power by burning
citizens: an inhabitant of a city or town
lack: to be deficient or missing
lengths: the longer or longest dimension of an object
fuel: a material used to produce heat or power by burning
citizens: an inhabitant of a city or town
lack: to be deficient or missing
lengths: the longer or longest dimension of an object
Environment: affected?, CHALLENGE 2
wolves: any of several large predatory canids
elk: soft tanned rugged leather
suddenly: happening or coming unexpectedly
beavers: either of two large semiaquatic herbivorous rodents comprising a family
aspens: any of several poplars
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