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'.
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ETYMOLOGY

KOREAN 3.0 Eng Wordtype Etym. Gb Vie
☆ SUFFERING HARDSHIP; PAINSTAKING; TROUBLED Adjective 苦生 스럽다 苦，辛苦，艰苦 khó nhọc, khổ ải, khổ sở, vất vả, gian nan