Question

sort the words according to the meanings of their shared roots.
reaccelerate decelerate elevator
accelerate levitate elevation
speed raise; rise

Explanation:

• For "speed" category:
• The word "accelerate" comes from the Latin root "celer" meaning "swift, quick" which is related to speed. The prefix "ac - " (intensive) makes it mean "to make quicken speed".
• "Reaccelerate" has the prefix "re - " (again) and the root related to speed (from "accelerate").
• "Decelerate" has the prefix "de - " (opposite, reduce) and the root related to speed (from "accelerate").
• For "raise; rise" category:
• "Elevator" comes from the root "lev" (meaning "raise, lighten") and the suffix "-ator" (a doer). An elevator is a device that raises people or things.
• "Levitate" has the root "lev" (raise) and means "to rise or float in the air".
• "Elevation" comes from the root "lev" (raise) and refers to the act of raising or the height of something.

Answer:

• speed: reaccelerate, decelerate, accelerate
• raise; rise: elevator, levitate, elevation