נָדָן

From LSJ

Βέλτιστε, μὴ τὸ κέρδος ἐν πᾶσι σκόπει → Amice, ubique lucra sectari cave → Mein bester Freund, sieh nicht in allem auf Profit

Menander, Monostichoi, 59

English (Strong)

of uncertain derivation; a sheath (of a sword): sheath.
probably from an unused root meaning to give; a present (for prostitution): gift.