草 (grass) + 原 (field), with the small つ giving the word a colloquial, slightly rough feel. It suggests neglected ground rather than a tended lawn.
Common collocations
- 草っ原で遊ぶ: to play in a grassy lot
- 一面の草っ原: a stretch of open grassland
- 草っ原になる: to become overgrown with grass
Similar words
- 原っぱ: open field — very close in meaning; the more common everyday word
- 草原: grassland, prairie — large and scenic, a written-style word
- 芝生: lawn — deliberately planted and maintained