intelligent

Etymology

From Middle French intelligent, from Latin intellegēns (“discerning”), present active participle of intellegō (“understand, comprehend”), itself from inter (“between”) + legō (“choose, pick out, read”).

adj

1. Of high or especially quick cognitive capacity, bright.
   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.” 1927, F. E. Penny, chapter 5, in Pulling the Strings
2. Well thought-out, well considered.
   The engineer had a very intelligent design proposal for the new car.
   The general devised an intelligent strategy for the southern campaign.
3. Characterized by thoughtful interaction.
   My girlfriend and I had an intelligent conversation.
4. Having at least a similar level of brain power to humankind.
   The hunt for intelligent life.
5. Having an environment-sensing automatically-invoked built-in computer capability.
   an intelligent network or keyboard