Rapid sand filtration is a purely physical drinking water purification method. Rapid sand filters (RSF) provide rapid and efficient removal of relatively large suspended particles. Two types of RSF are typically used: rapid gravity and rapid pressure sand filters. For the provision of safe drinking water, RSFs require adequate pre-treatment (usually coagulation-flocculation) and post-treatment (usually disinfection with chlorine).
with great suddenness the car in front stopped abruptly, and we almost hit it Synonyms short, suddenlyRelated Words surprisingly, unexpectedly; directly, immediately, incontinently, instantaneously, instantly, promptly, pronto, right, right away, right off, straightaway; fast, full-tilt, posthaste, quick, quickly, rapidly, readily, snappily, ...
Definitions for abruptÉËbrÊpt. Here are all the possible meanings and translations of the word abrupt. Princeton's WordNet(5.00 / 1 vote)Rate this definition: abrupt, disconnected(adj) marked by sudden changes in subject and sharp transitions. abrupt prose. abrupt(adj) exceedingly sudden and unexpected.