Inimical means hostile, or harmful to something. Inimical to growth, an inimical climate.
It is used more of conditions than of people, and it is a formal word. Something inimical to a plan does not oppose it so much as make it impossible.
1adjectiveinimicalHostile, or harmful to something.
“The rules were inimical to anything anybody wanted to do.”
inimical is a quality.
Late Latin inimicalis, from inimicus, an enemy, which is in-, not, plus amicus, a friend.
Latin
inimīcālis — hostile
English, today
inimical
Built from
From Late Latin inimīcālis (“hostile”), from inimīcus (“enemy”) (from in- (“not”) + amīcus (“friend”)) + -ālis.
Etymology from Wiktionary, CC BY-SA