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

Compounds Expand your vocabulary by studying more complex words built by the 'core words'.
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The soldiers stood their ground to protect the capital. Những người lính đã cố thủ để bảo vệ thủ đô. Military
They always stand their ground and never surrender. Họ luôn cố thủ và không bao giờ đầu hàng. Military
stand one's gound cố thủ Military