accidental
Unfall 
toevallig 
accidentel 
accidentale 
accidental 
บังเอิญ 
tình cờ 
偶然的 by chance
durch Zufall toevallig par hasard per caso por casualidad โดยบังเอิญ tình cờ 偶然 coincidental
zufällig toevallig coïncidence casuale coincidente บังเอิญ tình cờ 巧合 fortuitous
zufällig toevallig fortuit fortuito fortuito บังเอิญ tình cờ 偶然 | HSK5000 A1+A2+B1 |
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| HSK5000 B2 + C1 |
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| 3938 (adverb: coincidentally / by chance)  I was worried about not being able to find someone to help me, and David happened to show up.  Ich machte mir Sorgen, jemanden zu finden, der mir helfen konnte, und zufällig kam David.  Tôi đang lo lắng tìm người giúp đỡ thì tình cờ David đến. Tôi đang lo_lắng tìm người giúp_đỡ thì tình_cờ David đến . I | was | worry | find | person | help | then | by | chance | David | arrive |