Origin: Latin suffix -al
Residual has 5 different meanings across 2 categories:
(often plural) a payment that is made to a performer or writer or director of a television show or commercial that is paid for every repeat showing
"he could retire on his residuals"
A remainder left over at the end of some process.
"After cleaning out the attic, a few residual items remained on the floor."
In plain English: A residual is something that remains after everything else has been used up or finished.
"The residual effects of the storm left puddles on every street corner."
Of, relating to, or remaining as a residue; left over.
"The residual heat from the engine kept the car warm even after it had been parked for hours."
In plain English: Residual means something that is left behind after everything else has gone away.
"The residual heat from the stove made the kitchen uncomfortable for hours."
Usage: Use residual to describe anything that remains after other parts have been removed or used up, such as heat energy left in an engine or unpaid wages from previous shifts. This word specifically emphasizes what is leftover rather than a primary component of a whole system.
Residual entered English in 1570 through Old French and Latin, originally referring to a remainder or something that remains after the rest has been taken away. The word traces its roots back to the idea of sitting again, combining the prefix meaning "back" with a verb for "to sit."