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

☆☆☆ UNDERGROUND TUNNEL đường ngầm, địa đạo ☆☆☆ BASEMENT tầng hầm ☆☆ BASEMENT phòng ở dưới tầng hầm ☆☆ UNDERGROUND trong lòng đất
HSK 3.0 11000 CHINESE WORDS
4 地下  dìxia subterranean, underground, secretly, subsurface, secret, secret activity 6 地下室  dìxiàshì rumpus_room, soutane, undercroft, rooms built below ground, ground_floor, serdab, cellar, hypogeum, crypt, subterranean, silo, subterrane, souterrain, vault, cellarage, basement 7 地下水  dìxiàshuǐ groundwater

ENGLISH 6000 THEME WORDS
Das Haus: Basement Tầng hầm

OXFORD 5000 CORE WORDS

TANAKA 6000 CORE WORDS

The rain is coming down in earnest .

Mưa đang rơi xuống một cách nghiêm túc.
It has been raining on and off since morning .

Trời đã mưa liên tục từ sáng.
She got off easily .

Cô xuống xe dễ dàng.