難無く

プログレッシブ和英中辞典(第4版)

なんなく【難無く】

without (any) difficulty [trouble]; with ease

難無く片付いた
It was finished successfully.

難無く彼らの仲間入りができた
I had no trouble (in) joining their circle.／《口》 I joined their circle just like that.

出典　小学館「プログレッシブ和英中辞典(第4版)」