a special skill, talent, or aptitude

He had a knack for saying the right thing.

a clever or adroit way of doing something.

a trick or ruse.

a sharp, cracking sound.

Archaic . a knickknack; trinket.

noun

inability , ineptitude , lack , want

noun

adroitness , aptitude , aptness , bent , capacity , command , dexterity , expertise , expertism , expertness , facility , faculty , flair , forte , genius , gift , handiness , hang of it , head * , ingenuity , know-how , mastership , nose * , propensity , quickness , readiness , savvy * , set , skill , skillfulness , trick , turn , feel , adeptness , art , craft , mastery , proficiency , technique , head , instinct , ability , bauble , device , gewgaw , gimcrack , kickshaws , knickknack , nose , plaything , talent , toy , trinket