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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'.
Wordsense Learn about the wordsenses of the english term.

KOREAN 3.0	Eng	Wordtype	Etym.	Gb	Vie
☆	HARDSHIP; TROUBLE; SUFFERING; DIFFICULTY; ADVERSITY; TRIAL; ORDEAL	Noun	苦难	苦难，艰难	khổ nạn, nghịch cảnh
☆	HARDSHIP; ADVERSITY	Noun	逆境	逆境	nghịch cảnh
☆	DOGGEDNESS	Noun	七顚八起	百折不挠，百折不回	sự đứng dậy sau những lần vấp ngã, sự kiên cường cố gắng vượt lên nghịch cảnh