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cataclysm

noun
an event resulting in great loss and misfortune

catalyst

noun
something that causes an important event to happen

catapult

noun
an engine that provided medieval artillery used during sieges; a heavy war engine for hurling large stones and other missiles

cataract

noun
a large waterfall; violent rush of water over a precipice

sphericity

noun
the roundness of a 3-dimensional object

spheroid

noun
(geometry) a solid shape obtained by half-rotating an ellipse around one of its axis

spherometer

noun
a measuring instrument for measuring the curvature of a surface

emigrant

noun
someone who leaves one country to settle in another

to emigrate

verb
to leave one's own country in order to live in a foreign country

to perturb

verb
disturb in mind or make uneasy or cause to be worried or alarmed

perturbation

noun
an unhappy and worried mental state

to baste

verb
sew together loosely, with large stitches

bastion

noun
projecting part of a rampart or other fortification

prodigal

noun
a recklessly extravagant consumer

prodigious

adjective
so great in size or force or extent as to elicit awe

prodigy

noun
an impressive or wonderful example of a particular quality

epitome

noun
a standard or typical example

to epitomize

verb
embody the essential characteristics of or be a typical example of

lawgiver

noun
a maker of laws; someone who gives a code of laws

lawmaker

noun
a maker of laws; someone who gives a code of laws

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