intelligent
She gave an intelligent answer to the complex question.
Her response showed quick understanding of a difficult topic.
having or showing intelligence, especially of a high level
The intelligent student solved the math problem in seconds.
A high-ability learner quickly found the solution.
Dolphins are considered intelligent animals.
Dolphins demonstrate advanced cognitive abilities.
Often describes humans, animals, or systems that process information effectively.
using artificial intelligence or smart technology
The intelligent thermostat adjusts the temperature automatically.
A smart device learns user preferences to optimize heating.
Common in tech contexts for systems that adapt or learn.
Collocations
Pro Tip
Avoid overusing 'intelligent'
For people, 'clever', 'smart', or 'bright' are often more natural in casual conversation. 'Intelligent' works best in formal writing or when emphasizing advanced mental ability.
Gold Rule
Intelligent vs. Smart vs. Clever
'Intelligent' implies deep understanding and reasoning ability. 'Smart' suggests quick-wittedness. 'Clever' often implies quick but sometimes superficial cleverness. Example: An 'intelligent' person solves problems logically; a 'clever' person finds shortcuts.
Word Origin
From Latin 'intelligent-' (present participle of 'intelligere' meaning 'to understand'), from 'inter-' (between) + 'legere' (to choose, read). First used in English in the 14th century to mean 'having the power of understanding'.
Usage Notes
More formal than 'smart' or 'clever'—often used in academic or technical contexts. Avoid using for animals unless emphasizing cognitive abilities (e.g., 'intelligent dog' sounds unnatural; 'clever dog' is preferred).