Meaning & use
insubstantial
Lacking solid physical substance, real importance, or firm basis; flimsy or insufficient.
See it in a sentence
The bridge's insubstantial railing wobbled alarmingly when she leaned against it.
His insubstantial excuse failed to convince the teacher he had done the homework.
A note on using this word
Insubstantial can describe physical flimsiness or a weak argument, and commonly pairs with words like 'evidence' or 'excuse.'
Words with a similar meaning
flimsyinsufficient
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
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