田ぼ
たんぼ · tanbo · JLPT N2 · noun
paddy
🌾 田 (ta, rice paddy) + ぼ (bo, from 圃, cultivated plot) = rice paddy plot
The full kanji form 田圃 is read tanbo. 田 means rice paddy and 圃 means a cultivated plot, so the word names a paddy plot. The kana form 田ぼ keeps the sound of the second part.
田 — enclosure 囗 + cross 十 (field grid)
田 is a pictograph of a cultivated field divided by raised paths or irrigation ditches into plots, shown as a square with a cross inside. Its original sense was 'farmland,' which it still carries today, and it also serves as a common surname.