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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'.

{adj}	welcome	(whose arrival is a cause of joy)	willkommen
{interj}	welcome	(greeting given upon someone's arrival)	willkommen
{n}	welcome	(act of greeting someone's arrival)	Begrüßung {f}, Empfang {m}
{n}	welcome	(utterance of such a greeting)	Begrüßung {f}
{v}	welcome	(affirm or greet the arrival of someone)	willkommen heißen, begrüßen
{v}	welcome	(to accept willingly)	begrüßen, gutheißen