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

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.

TOPIK 11000 KOREAN WORDS

☆☆☆ STRAIGHT; UPRIGHT một cách ngay ngắn, một cách thẳng tắp ☆☆ NEAT; TIDY đoan chính ☆☆ PROPER; HONEST đúng đắn ☆ MISCONDUCT; MISBEHAVIOR sự bất lương ☆ STRAIGHT thẳng, ngay ngắn
HSK 3.0 11000 CHINESE WORDS
7 端正  duānzhèng upright, regular, proper, correct

ENGLISH 6000 THEME WORDS

OXFORD 5000 CORE WORDS

TANAKA 6000 CORE WORDS