derived from the Latin word
atomus (atom, ultimate component of matter, particle incapable of being divided; indivisible, atomic, that cannot be cut)
derived from the Greek word
atomos, ἄτομος (uncut; indivisible (an 'atom' of time))
derived from the Greek word
temnein, τέμνω (to cut)
derived from the Proto-Indo-European root
*tem-using the Greek prefix
a-, ἀ- (an- not, without)