utrubidem

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

Source

Latin > English (Lewis & Short)

ū̆trŭbīdem: (ū̆trŏbīdem), adv. utrubi-dem,
I on both sides, on each or either side (when the two sides are spoken of): utrosque percognovi utrubidem, Plaut. Truc. 1, 2, 50 (dub.; Speng. utrosque pergnovi probe).