| Tools to study difficult words | Show Helper |
| Hard TOEFL Words - Group 1 | View Group Words |
New Known Review |
astronomy |
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n. branch of physics that studies celestial bodies and universe as a whole |
New Known Review |
atom |
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n. a tiny piece of anything; the smallest component of an element having the chemical properties of the element |
New Known Review |
atrial |
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a. of or pertaining to an atrium, especially the upper chambers of the heart |
New Known Review |
atrocity |
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n. extreme criminality or cruelty; quality of being shockingly cruel and inhumane |
New Known Review |
attachment |
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n. a bond, as of affection or loyalty; fond regard; supplementary part; accessory |