like: der Stau → →
der Stau ☊ 
tắc đường ☊ 
☊ der Staub ☊ bụi ☊ ☊ der Staubsauger ☊ máy hút bụi ☊ ☊ As the dust cleared, we saw that the whole ceiling had come down. ☊ clear ☊
The dam was not strong enough to hold back the flood waters. ☊ hold sb/sth back ☊