clever
adj.adj. quick to learn and understand things. You use it to describe someone who is smart or a solution that is very creative.
adj. possessing or displaying mental agility, quick-wittedness, or ingenuity. Often used to describe an effective but simple solution to a complex problem.
She is a very clever student who always has the right answer.
The engineer came up with a clever way to fix the engine using only basic tools.
While the plan was undeniably clever, it relied too heavily on the assumption that every participant would remain silent under pressure.
From East Anglian dialectal English cliver (“expert at seizing”), from Middle English cliver (“tenacious”). perhaps from Old English clifer, clibbor (“clinging”); or perhaps from Dutch, Low German, or East/Saterland Frisian (compare kluftich (“clever, prudent”), probably derived from Proto-West Germanic kleuban (“to cleave, split”)); or dialectal Norwegian klover (“ready, skillful”), itself borrowed from Middle Low German klever, related to kleven (“to stick”), from Old Saxon klibōn, from Proto-West Germanic klibēn, related to the Old English word above; * possibly influenced by Old English clifer (“claw, hand”) (compare clawian (“to claw”)). Related to cleave. Perhaps influenced by Welsh celfydd (“talented, dexterous, expert”).
Gradable adjective; commonly used with 'at' when referring to a specific skill ('clever at math').