1 (wiktionary) 2 (vi.wikipedia) 3 (en.wikipedia) 4 (glosbe)

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}	guard	(part of machine blocking dangerous parts)	Schutz {m}
{n}	guard	(person who or thing that protects something)	Wächter {m}
{v}	guard	(to protect from some offence)	schützen