Efficacy of industrial energy storage batteries in Zimbabwe

According to OED: diffident: modest or shy because of a lack of self-confidence: a diffident youth. Another word as @Jim suggested would be timid. timid: showing a lack of …

I routinely hear the word "efficate" being used. For example, "The most powerful way to efficate a change in the system is to participate." I do not find entries for this word in …

Any subtle difference concerning the viability and efficacy of criticism, according to the preposition used? The Ngram shows that "immune against" has always been unusual.

The word efficacy is often used in the medical field. For example, a paper might be on the efficacy of a treatment or a particular drug. The word, of course, implies how effectual …

Having sufficient power or efficacy; valid. valid sound; just; well-founded: a valid reason. producing the desired result; effective: a valid antidote for gloom. having force, weight, …

Efficacy is a perfect word for this use and is usually used in the context of drug function when discussing how good a particular substance is at achieving a goal.

Effectually is effectively archaic. Don''t use it. Note that OP''s definitions evidence the fact that the two words are synonyms in the adverbial sense of "with efficacy", which …

5 My friend in the industry wrote up a little explanation for me to share: The readout is essentially when the results of a clinical trial are made public. It can take a long time …

I usually use the word "effectiveness" in conversation, but sometimes I use the word "efficacy" then self-correct with "effectiveness" . Is there a practical difference between them?

Agreed - Efficacy is about the results, whereas Efficiency is about waste when achieving the results. Something could be said to have good efficacy but poor efficiency, if it …