IPA: /ˈɜːrθˌʃeɪkɪŋli/
KK: /ˈɜrθˌʃeɪkɪŋli/
In a way that is extremely surprising or significant, often causing a strong reaction.
The news was earthshakingly important for the future of the community.
Earthshakingly → It is formed from "earth" (from Old English "eorþe", meaning the ground or soil), "shaking" (from the verb "shake", which has Germanic origins meaning to move back and forth), and "-ly" (a suffix meaning in a manner of). The word "earthshakingly" describes something done in a manner that causes significant disturbance or impact, as if shaking the very ground.
Think of the ground ('earth') being disturbed ('shaking') in a significant way, and the '-ly' just means in that manner. This helps you remember that 'earthshakingly' refers to something done in a way that has a profound impact.
No commonly confused words.