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

HSK 3.0 11000 CHINESE WORDS

ENGLISH 6000 THEME WORDS
Die Privatunterhaltung: Mp3 player Máy nghe nhạc mp3

OXFORD 5000 CORE WORDS

TANAKA 6000 CORE WORDS

L114 chuyển gì đó sang máy nghe nhạc mp3 etwas auf den MP3-Player überspielen to record sth. to a MP3-player