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Synonyms

insufficient

American  
[in-suh-fish-uhnt] / ˌɪn səˈfɪʃ ənt /

adjective

  1. not sufficient; lacking in what is necessary or required.

    an insufficient answer.

    Synonyms:
    deficient, scanty, inadequate
  2. deficient in force, quality, or amount; inadequate.

    insufficient protection.


insufficient British  
/ ˌɪnsəˈfɪʃənt /

adjective

  1. not sufficient; inadequate or deficient

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • insufficiently adverb

Etymology

Origin of insufficient

First recorded in 1350–1400; Middle English, from Late Latin insufficient-, stem of insufficiēns; equivalent to in- 3 + sufficient

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But the investigation, which began in 2016, was closed in 2019 after the Crown Prosecution Service deemed there was insufficient evidence to bring charges.

From BBC

The DOJ routinely declines to prosecute cases for any number of reasons, including insufficient evidence or because a case is not a priority for enforcement.

From Salon

If existing global trading rules are insufficient for a challenge of this magnitude, everyone from policymakers to corporate executives has to ask what the middle ground actually looks like.

From The Wall Street Journal

As first reported by the Mirror, the investigation which began in 2016 was dropped in 2019 after the CPS deemed there was insufficient evidence to bring charges.

From BBC

Possible breaches included providing "insufficient measures to prevent new under 16 accounts being created".

From Barron's