長々
ながなが · naganaga · JLPT N1 · noun
long
🐍 Compound: 長 (naga, long) doubled with 々 = long-long, stressing something drawn out
The 々 mark repeats the kanji 長 (long), so the word doubles 'long' to stress something drawn out or extended. Say it slowly as naga-naga to match the meaning.