[ in-ter-nee-seen, -sahyn, -nes-een, -nes-ahyn ]
/ ˌɪn tərˈni sin, -saɪn, -ˈnɛs in, -ˈnɛs aɪn /
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of or relating to conflict or struggle within a group: an internecine feud among proxy holders.
mutually destructive.
characterized by great slaughter; deadly.



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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Also in·ter·ne·cive [in-ter-nee-siv, -nes-iv]. /ˌɪn tɛrˈni sɪv, -ˈnɛs ɪv/.

Origin of internecine

1655–65; <Latin internecīnus, internecīvus murderous, equivalent to internec(āre) to kill out, exterminate (inter-inter- + necāre to kill) + -īnus-ine1, -īvus-ive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for internecine

British Dictionary definitions for internecine

/ (ˌɪntəˈniːsaɪn) /


mutually destructive or ruinous; maiming both or all sidesinternecine war
of or relating to slaughter or carnage; bloody
of or involving conflict within a group or organization

Word Origin for internecine

C17: from Latin internecīnus, from internecāre to destroy, from necāre to kill
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