at any cost; no matter what; stubbornly
Expresses a strong determination to do or not do something, often with a nuance of stubbornness or defiance. Used adverbially with verbs.
He stubbornly refused to apologize, no matter what.
意地でもその計画を成功させたい。
I want to make that plan succeed at any cost.
From 意地 (いじ, 'stubbornness' or 'willfulness') + でも ('even if'). The phrase literally means 'even if it's stubbornness', implying a refusal to yield.