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Core Words Familarize yourself with the 'core words'.
Compounds Expand your vocabulary by studying more complex words built by the 'core words'.
Etymology Explore the origin of the 'core words'.

{n}	eraser	(chalkboard eraser)	Tafelschwamm {m}
{n}	eraser	(thing used to erase something written or drawn)	Radiergummi {m} {n}, [colloquial] Radierer {m}, [colloquial] Gummi {m} {n}