From the BBC:
though, even though and even so, even if
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When we use even before if, when and though, it has the effect of
making the ideas expressed appear more extreme or surprising. Even if
is used for emphasising that although something might happen, the
situation will not change:
I shall continue to work from 6 a.m. till midnight, even if it kills me.
Even if I became a millionaire, I would not stop working.
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