The word vocation is a descendant of Latin vocatio, meaning
"summons." Vocatio, in turn, comes from vocare, meaning "to
call," which itself is from vox, meaning "voice." Vocation also
has a secular position in the English language as a word for the strong desire
to do a certain kind of work or the work itself, much like the words calling or
occupation.
The Middle French word Nuer
produced nuance, which in Middle French meant "shade of color."
English borrowed nuance from French, with the meaning "a subtle
distinction or variation," in the late 18th century.