Quick-witted and Up on

Quick-witted adjective - Having or showing quickness of mind.

Up on and quick-witted are semantically related In some cases you can use "Up on" instead an adjective phrase "Quick-witted".

Up on adjective - Being up to particular standard or level especially in being up to date in knowledge.

Quick-witted and up on are semantically related in clever topic. Sometimes you can use "Quick-witted" instead an adjective "Up on".