澄清 → ☊ cheng2qing1 
clear (of liquid); limpid; to clarify; to make sth clear; to be clear (about the facts) ☊ 
Làm rõ ☊ 澄清 → ☊ deng4qing1 to settle (of liquid); to become clear (by precipitation of impurities); precipitate (chemistry); to put in order; to quell disturbances ☊ Làm rõ ☊