広々
ひろびろ · hirobiro · JLPT N2 · adverb
spacious
広々 = 広 (hiro, wide) + 々 (repeat mark): 'wide, wide', meaning very roomy and spacious
The 々 mark repeats the kanji 広 (hiro, wide). Doubling it intensifies the meaning, so the word describes a space that is very wide, open, and roomy.