carpir

In agricultural use, especially in parts of Latin America, to weed or hoe a field by hand (carpir el maizal, to weed the cornfield). In older, literary Spanish it also meant to lament or mourn.

• Los campesinos carpían la milpa al amanecer. — The farmers weeded the cornfield at dawn.
• Hay que carpir antes de que la maleza tape los surcos. — You have to weed before the brush covers the furrows.
• El poema antiguo describe a la viuda que carpía su pena. — The old poem describes the widow mourning her grief.

The agricultural sense (weeding) is regional and rural; the mourning sense is archaic and literary — neither is common in everyday urban Spanish, where desyerbar/deshierbar covers weeding.