Request shortened to its parameter name — the asking half of every exchange, as code spells it.
Clipped from request, from Latin requirere (to seek again, to ask for): re- (again) + quaerere (to seek); req shortens the word to its parameter name and keeps none of the asking's grammar, only its function.
Request shortened to its parameter name. The asking half of every exchange, spelled the way code spells it rather than the way speech does.