principally

adverb

prin·​ci·​pal·​ly ˈprin(t)səp(ə)lē 

-səb(-, 

-li also -inzp(ə)l- or -in(t)sp-

: in a principal manner : in the chief place or degree : primarily, chiefly, mainly

Word History

Etymology

Middle English, from principal entry 1 + -ly

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