Definition

The ability to produce a specific result or effect that is wanted or intended.

Example

The efficaciousness of the new medicine was proven in clinical trials.

Conversation

Have you ever thought about the efficaciousness of different study methods?

Yeah, some techniques really help me absorb information better than others.

Exactly! I’m trying to find the most efficaciousness way to prepare for my exams this semester.

That makes sense; it’s all about finding what works best for you.

Synonyms & Antonyms

Root Explanation

Efficaciousness → It is formed from "efficax" (from Latin, meaning effective or able to produce a desired effect) and the suffix "-ness" (meaning the state or quality of). The word "efficaciousness" refers to the quality of being effective or capable of producing the intended result.

Memory Tip

Think of 'efficax' meaning effective, and remember that 'efficaciousness' describes the quality of being effective.

Visually Confused Words