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inimical

or in·im·i·ca·ble

[ih-nim-i-kuh l or ih-nim-i-kuh-buh l]
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adjective
  1. adverse in tendency or effect; unfavorable; harmful: a climate inimical to health.
  2. unfriendly; hostile: a cold, inimical gaze.

Origin of inimical

1635–45; < Latin inimīc(us) unfriendly, hostile (see enemy) + -al1
Related formsin·im·i·cal·ly, adverbin·im·i·cal·ness, in·im·i·cal·i·ty, nounun·in·im·i·cal, adjectiveun·in·im·i·cal·ly, adverb
Can be confusedinimical inimitable

Synonyms

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1. noxious. 2. antagonistic. See hostile.

Antonyms

2. friendly.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for inimicality

inimical

adjective
  1. adverse or unfavourable
  2. not friendly; hostile
Derived Formsinimically, adverbinimicalness or inimicality, noun

Word Origin

C17: from Late Latin inimīcālis, from inimīcus, from in- 1 + amīcus friendly; see enemy
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

Word Origin and History for inimicality

inimical

adj.

1640s, from Late Latin inimicalis "hostile," from Latin inimicus "unfriendly, an enemy" (see enemy).

Online Etymology Dictionary, © 2010 Douglas Harper