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Synonyms

spineless

American  
[spahyn-lis] / ˈspaɪn lɪs /

adjective

  1. having no spines or quills.

  2. having no spine or backbone.

  3. having a weak spine; limp.

  4. without moral force, resolution, or courage; feeble.

    a spineless, lily-livered coward.

    Synonyms:
    indecisive, irresolute, weak
    Antonyms:
    resolute, strong

spineless British  
/ ˈspaɪnlɪs /

adjective

  1. lacking a backbone; invertebrate

  2. having no spiny processes

    spineless stems

  3. lacking strength of character, resolution, or courage

"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

Etymology

Origin of spineless

First recorded in 1820–30; spine + -less

Explanation

If you're spineless, you're weak or cowardly — or both. It would be spineless to watch a bully pick on someone much smaller and not try to intervene. You can certainly use this adjective to literally mean "lacking a spine," and you might if you're talking about invertebrates like the spineless forest lizard or the Garo spineless eel. It's more common to call people spineless as a derogatory way of commenting on their weakness. A spineless superhero is too scared to confront the bad guys, and a spineless politician avoids conversation with critical constituents.

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Vocabulary lists containing spineless

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.

“Maybe people do it out of desperation,” she told me, “but it’s spineless and demoralizing.”

From Slate • Jan. 20, 2026

Asked about Farage, Sir Keir said: "The man is spineless".

From BBC • Nov. 21, 2025

As per Margaret Hartmann with New York Magazine's Intelligencer, the gift is "peak spineless groveling."

From Salon • Jan. 15, 2025

But they and other invertebrates are the spineless backbones of ecosystems, playing critical roles as pollinators, predators, prey and decomposers.

From New York Times • May 28, 2024

Those spineless types who talk about abolishing the apostrophe are missing the point, and the pun is very much intended.

From "Eats, Shoots & Leaves" by Author

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