Meaning of againstism in English:
againstism
noun
informal USThe position or practice of being opposed to something, or of having an oppositional attitude in general; (habitual) opposition or criticism.
Pronunciation
againstism
/əˈɡɛnstɪz(ə)m/ /əˈɡeɪnstɪz(ə)m/Origin
1940s. From against + -ism. Compare earlier againstness, againster.
Are You Learning English? Here Are Our Top English Tips