ἀληπτότερος
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
Lexicon Thucydideum
minus expugnabilis, less able to be stormed, 1.37.5, 1.82.4, 1.143.5.