This is the 5878th most frequent Japanese word.
ぽつんと
"ぽつんと" means "solitarily" or "isolatedly," describing something standing or positioned alone.
"ぽつんと" is used here to describe the isolated and solitary appearance of the tree standing in the middle of the road.
道の真ん中にぽつんと立っている木があります。
There is a tree standing isolated in the middle of the road.
"ぽつんと" expresses the idea of the man's solitary presence, emphasizing that he is alone and isolated.
ぽつんとひとりで公園のベンチに座っている男性を見かけた。
I noticed a man sitting alone on a park bench.
"ぽつんと" conveys her isolated position in the corner, suggesting her disconnection or exclusion from the group or activity.