inimical

UK: /ɪˈnɪmɪk^əl/ US: /ɪˈnɪmɪkəl/ ,(i nim′i kəl)

WordReference Random House Learner's Dictionary of American English © 2025

in•im•i•cal /ɪˈnɪmɪkəl/   adj. 

1. harmful;
   causing injury:
   conditions inimical to health.
2. unfriendly;
   hostile:
   a cold, inimical gaze.

in•im•i•cal•ly, adv. 

WordReference Random House Unabridged Dictionary of American English © 2025

in•im•i•cal  (i nim′i kəl), adj. 

1. adverse in tendency or effect;
   unfavorable;
   harmful:
   a climate inimical to health.
2. unfriendly;
   hostile:
   a cold, inimical gaze.

Also, in•im′i•ca•ble. 

• Latin inimīc(us) unfriendly, hostile (see enemy) + -al¹
• 1635–45

in•im′i•cal•ly, adv. 
in•im′i•cal•ness, in•im′i•cal′i•ty, n. 
Synonyms

• 1. noxious.
• 2. antagonistic. See hostile. 

Antonyms

• 2. friendly.

Collins Concise English Dictionary © HarperCollins Publishers::

inimical / ɪˈnɪmɪk^əl/ adjective

1. adverse or unfavourable
2. not friendly; hostile

Etymology: 17th Century: from Late Latin inimīcālis, from inimīcus, from in-¹ + amīcus friendly; see enemy

inˈimically adverb

inˈimicalness, inˌimiˈcality noun