αμφήριστος
From LSJ
ἐν πίθῳ τὴν κεραμείαν μανθάνειν → in breaking many pots, the potter learns his craft | of those who undertake the most difficult tasks without learning the elements of the art | don't run before you can walk
Greek Monolingual
ἀμφήριστος, -ον (Α)
(για πόλεις, νίκες κ.λπ.) αυτός που διεκδικείται και από τις δύο πλευρές, αμφισβητούμενος, αμφίβολος, αβέβαιος.
[ΕΤΥΜΟΛ. < ἀμφ(ι)- + -ήριστος < ἐρίζω.