נִיר
From LSJ
πάντα χωρεῖ καὶ οὐδὲν μένει καὶ δὶς ἐς τὸν αὐτὸν ποταμὸν οὐκ ἂν ἐμβαίης → all things move and nothing remains still, and you cannot step twice into the same stream
English (Strong)
a root probably identical with that of נֵר, through the idea of the gleam of a fresh furrow; to till the soil: break up.
or nir; from נִיר; properly, plowing, i.e. (concretely) freshly plowed land: fallow ground, plowing, tillage.
