IPA: /ɪˈkwɪpəˌlɛntli/
KK: /ɪˈkwɪpəˌlɛntli/
In a way that indicates equal power or significance.
The two arguments were equipollently valid, making it difficult to choose one over the other.
Equipollently → It is formed from "equi-" (meaning equal) and "pollent" (from Latin "pollens", meaning powerful or having strength) with the adverbial suffix "-ly" (meaning in a manner). The word "equipollently" means in an equal or equally powerful manner.
Think of 'equal' ('equi-') and 'powerful' ('pollent') to remember that 'equipollently' means in a manner that is equally powerful.
No commonly confused words.