English Reference
adjective

ingenious

adj.
US /ˌɪnˈdʒinjəs/ UK /ɪndʒˈiːnɪəs/ in·ge·nious

  1. 01 B2 Upper Intermediate

    describes a thing or an idea that is very clever and original.

    characterised by cleverness or originality of invention or construction; often applied to solutions, devices, or plans.

    Simple

    The designer found an ingenious way to fit a bed and a desk into the tiny room.

    In context

    The engineers developed an ingenious cooling system that used significantly less electricity than traditional models.

    Usage

    Usually placed before a noun or after a linking verb like 'be' or 'seem'.

    Teacher's tip

    Learners often confuse this with 'ingenuous'. Remind them that 'ingenious' is related to 'genius'.

    Pitfall
    The plan was very ingenuous. The plan was very ingenious.

    Do not confuse 'ingenious' (clever) with 'ingenuous' (honest and innocent).

    unimaginativeclumsy
  2. 02 C1 Advanced Formal

    describes a person who is very good at inventing things or solving problems in clever ways.

    possessing or showing great skill at invention or discovery; resourceful and brilliant in mental character.

    Simple

    He was an ingenious cook who could make a great meal out of almost nothing.

    In context

    The ingenious young programmer managed to bypass the security flaw that had baffled the senior staff for weeks.

    Teacher's tip

    While 'clever' is common in speech, 'ingenious' is a more sophisticated choice for academic or professional praise.

    dulluncreative
Don't confuse

ingenious vs ingenuous — Ingenious describes a clever idea or person, while ingenuous describes a person who is innocent and lacks guile.

Life hacks are everywhere on social media—people reuse everyday materials and objects to create ingenious solutions to common problems and needs.

Phys.org· 25 Aug 2026

That is partly down to the genius of the play but Fall adds an ingenious tweak in the suggestion that Tony and Ange are of “Pakistani” origin.

The Guardian· 20 Aug 2026

Borrowed from Middle French ingénieux, from Old French engenious, from Latin ingeniōsus (“endowed with good natural capacity, gifted with genius”), from ingenium (“innate or natural quality, natural capacity, genius”), from in- (“in”) + gignere (“to produce”), Old Latin genere. See also engine.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin itc-ola genere
Level B2 · Upper Intermediate
Frequency Frequent
Updated