Idiom Definition:
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"first of all"
before doing anything else
Synonyms:
basically, cardinally, cardinal, chiefly, dominantly, dominant, eminently, eminent, especially, essential, essentially, fundamental, fundamentally, important, importantly, main, mostly, notably, particularly, predominant, predominantly, preeminent, preeminently, prevail, prevailingly, prevalent, prevalently, prime, primary, primarily, supreme, supremely