νευστήρ
From LSJ
ἡμῶν δ' ὅσα καὶ τὰ σώματ' ἐστὶ τὸν ἀριθμὸν καθ' ἑνός, τοσούτους ἔστι καὶ τρόπους ἰδεῖν → whatever number of persons there are, the same will be found the number of minds and of characters
English (LSJ)
ῆρος, ὁ, (νέω A)
A swimmer, sailor, Hsch. (νευτήρ cod., fort. <ἀρ>νευτήρ).
Greek (Liddell-Scott)
νευστήρ: ῆρος, ὁ, (νέω, νεύσομαι) κολυμβητής, Ἡσύχ. (ἔνθα νευτήρ).