CORE WORDS
Compounds Expand your vocabulary by studying more complex words built by the 'core words'.
Etymology Explore the origin of the 'core words'.
Wordsense Learn about the wordsenses of the english term. Verbs Nouns Adjectives Pronouns Prepositions Conjunctions
TOPIK | DIFFICULT; TOUGH; PAINSTAKING; STRENUOUS | | 吃力，费劲，艰难 | 힘겹다 | てごわい【手強い】 | vất vả, gian khổ, khó khăn, gian nan | DIFÍCIL, DURO | |