IPA: /əˈkɛləˌreɪtɪŋli/
KK: /ək'sɛləˌreɪtɪŋli/
In a way that increases speed or intensity.
The car was moving acceleratingly down the highway.
Acceleratingly → It is formed from "accelerare" (from Latin, meaning to hasten or increase speed) and the suffix "-ing" (indicating the action or process) combined with "-ly" (meaning in a manner). The word describes the manner in which something is increasing in speed or becoming faster.
Think of 'hastening' ('accelerare') to remember that 'acceleratingly' means doing something in a faster manner.