It means when someone is fighting the opposite of its self.
If by 'opposite' you mean the word for someone of the opposite sex who has the same state or condition expressed in the word, then the opposite of 'bachelorette' is 'bachelor'.
if you mean "con" this means to fool someone by pretending to be honest and moral which of course is exactly the opposite.
Someone who loves foreigners. The opposite of xenophobic - someone who hates, or is fearful of foreigners.
If you mean hetero-someone likes the opposite sex
"Polishia" does not have a recognized meaning in English. It may be a misspelling or non-standard term. If you provide more context or details, I can try to help further.
Sarcasm?
The opposite of a tree hugger, someone who Does not care for the environment.
If you're leaving someone out, you're not including them in something. So, the opposite would be to include them or make someone feel welcome into a group, etc. Including them would mean talking to them, getting their input on decisions etc. So essentially, the opposite of excluding someone is to include them.
From a poor background. The opposite of posh. Can also mean coarse, uncouth, vulgar.
Opposite direction of what they were doing in life.
Answer A first crush is the first time you have feelings for someone of the opposite sex.