adept

“Your friend performs delightfully,” he continued, after a pause, on seeing Bingley join the group; “and I doubt not that you are an adept in the science yourself, Mr.

“Young Edward!” A burst of laughter from the auditors did not in the least disconcert the speaker, who continued,—“Yes, gentlemen; Edward, the infant phenomenon, who is quite an adept in the art of killing.”

Most educated citizens are highly adept at code-switching, effortlessly transitioning from standard English in the boardroom to Singlish at the local food market.