This is the 3789th most frequent Japanese word.
のんびり
Relaxed; carefree; at leisure.
In this sentence, 'のんびり' describes spending time in a relaxed and leisurely manner.
ここでのんびりと過ごしてみませんか。
Would you like to spend some peaceful time here?
'のんびり' is used to illustrate the calm and unhurried activity of reading at home.
休日は家でのんびり読書をします。
On holidays, I leisurely read at home.
'のんびり' characterizes the unhurried and enjoyable nature of the walk.