like: der Staub → →
der Staub ☊ 
bụi ☊ 
☊ der Staubsauger ☊ máy hút bụi ☊ ☊ As the dust cleared, we saw that the whole ceiling had come down. ☊ clear ☊
der Staub ☊ bụi ☊ ☊ der Staubsauger ☊ máy hút bụi ☊ ☊