עָפָר
From LSJ
ὁ αὐτὸς ἔφησε τὸν μὲν ὕπνον ὀλιγοχρόνιον θάνατον, τὸν δὲ θάνατον πολυχρόνιον ὕπνον → Plato said that sleep was a short-lived death but death was a long-lived sleep
English (Strong)
from עָפַר; dust (as powdered or gray); hence, clay, earth, mud: ashes, dust, earth, ground, morter, powder, rubbish.