aptitude
AP-tih-toodnounMeaning a natural ability to learn or do something
Memory hook APT-itude: a natural FIT. The very first time Kai sits at a piano, he plays a whole song by ear; he has an aptitude for music.
Maya showed an early aptitude for languages and spoke three by age ten.
In context Kai had never touched a piano before, but his aptitude was obvious: within a week he was playing songs by ear that took other students months to learn.
Similar talent, gift, knack, ability
Opposite inability, ineptitude
From Late Latin aptitudo, “fitness,” from aptus (fit, suited).