IPA: /ˌɛfɪˈkeɪʃəsli/
KK: /ɛfɪˈkeɪʃəsli/
In a way that produces the desired result or effect; effectively.
The new policy was implemented efficaciously, leading to improved outcomes for the community.
Efficaciously → It is formed from "efficax" (from Latin, meaning effective or producing the desired effect) and the suffix "-ly" (meaning in a manner). The word "efficaciously" means in a manner that produces the desired effect or is effective.
Think of 'effective' when you hear 'efficaciously' — it means doing something in a way that achieves the desired result.