bèn

Etymology
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This word belongs to a group of post-reconstructed Old Chinese, pre-Middle Chinese loans in Vietnamese, showing both the correspondence of Vietnamese A tones (/) with Middle Chinese C tone (due to the loss of ) and the absence of palatalization in the onset, while the Sino-Vietnamese form from Late Middle Chinese shows the palatalization and the tonal correspondance between Vietnamese B tones (/) and Sinitic tone C.

Adverb

 * 1)  and so one does something; then; thereupon