Adjective

(en adjective)

Making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy.

* {{quote-magazine, title=A better waterworks, date=2013-06-01, volume=407, issue=8838

, page=5 (Technology Quarterly), magazine=(The Economist) citation , passage=An artificial kidney these days still means a refrigerator-sized dialysis machine. Such devices mimic

Using a particular proportion of available energy.

Causing effects; producing results.

* Wilson

The efficient cause is the working cause.

Adjective

(en-adj)

Of high or especially quick cognitive capacity, bright.

*{{quote-book, year=1927, author= F. E. Penny

, chapter=5, title= Pulling the Strings , passage=Anstruther laughed good-naturedly. “[…] I shall take out half a dozen intelligent maistries from our Press and get them to give our villagers instruction when they begin work and when they are in the fields.”}}

Well thought-out, well considered.

Characterized by thoughtful interaction.

Having the same level of brain power as mankind.

Having an environment-sensing automatically-invoked built-in computer capability.