Meaning of 抑難 in Japanese

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Definition of 抑難

そもそも(somosomo) 【抑 ·抑抑 ·抑々】

(conj) in the first place; to begin with; from the start; originally; ab initio
そもそもなぜ鳥は移動するのだろうか。
In the first place, why do the birds migrate at all?

なん(nan) 【難】

(n, n-suf) difficulty; hardships; defect
その問題は難なく克服できる。
We can get over the problem without difficulty.