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"Ingenious" = clever, brilliantly creative or inventive; "ingenuous" = innocent, naive, candid and without deception.
Side-by-side comparison
"Ingenious" describes someone or something showing remarkable creativity and cleverness in solving problems. "An ingenious solution" = a brilliantly clever solution.
The engineer came up with an ingenious solution to reduce water waste in the factory by 60%.
What an ingenious design, the furniture folds into itself and takes up almost no space.
Leonardo da Vinci was ingenious not only as an artist but as an inventor centuries ahead of his time.
"Ingenuous" describes someone honest, without guile, and innocent in their outlook. It can imply being too naive or easily deceived. It is the opposite of "disingenuous".
Her ingenuous belief that everyone tells the truth made her easy to manipulate.
The child gave an ingenuous answer that made the adults in the room burst out laughing.
He had an ingenuous quality about him, what you saw was exactly what you got, with no hidden agenda.
Common mistake
- •"What an ingenuous idea!" when admiring creativity is wrong: the brilliantly clever or inventive person or idea is "ingenious" (in-GENIUS).
- •"Ingenuous" means candid, naive, or without guile.
Trick to remember it
- •"Ingenious" = in-GENIUS (inside the genius): brilliantly creative.
- •"Ingenuous" = in-GENUINE (genuinely candid): honest and naive.
Quick rule
"Ingenious" = brilliantly clever and creative (adjective). "Ingenuous" = naive, candid, without deception (adjective). Near-visual twins but semantic opposites: the clever one vs the innocent one.
Did you know?
Both words come from the same Latin "ingenium" (natural capacity, innate talent), in the original Latin they meant practically the same thing: natural talent. Over time, "ingenious" shifted toward "brilliantly creative" in English, while "ingenuous" shifted toward "showing one's nature as it is" (candor, absence of guile). The antonym of "ingenuous": "disingenuous", is widely used in political journalism to describe someone who pretends honesty or innocence while actually having hidden motives: "a disingenuous argument" (an argument with an appearance of good faith but with a manipulative intent). "Disingenuous" is one of the most elegant words in English for accusing someone of sophisticated hypocrisy without saying it directly.
Practise what you learned
Exercise 1 · Pick the right one
What an _____ solution! Nobody else would have thought of that.
Exercise 2 · Pick the right one
He was so _____ that he believed every promise the salesman made.
Exercise 3 · Form the word
Related word pairs
"Discrete" = separate, distinct, independent; "discreet" = careful and prudent, not revealing private information.
"Sensual" = related to physical or sexual pleasure and desire; "sensuous" = pleasantly engaging the senses in an aesthetic way.
"Above" is at a higher level without contact; "over" implies covering, movement, or crossing.
'Currently' means 'at the present time'; 'actually' means 'in reality', not 'nowadays'.
Bryan López
Founder of SpeakUP Academy