• С <ОТ> МОЛОДЫХ <МЛАДЫХ> НОГТЕЙ
[PrepP; these forms only; adv; fixed WO]
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⇒ from the time a person is or was extremely young:
- from (since) infancy;
- from the cradle;
- from (since) (early) childhood;
- from (since) one's earliest days;
- since one was knee-high. Юле, еще с младых ногтей твердо усвоившей, что религия - опиум народа, невыносимо было слушать Антоновы разъяснения разницы между верой и суеверием (Гинзбург 2). Julia, who almost from the cradle had had it drummed firmly into her head that religion was the opium of the people, could not bear hearing Anton hold forth on the differences between faith and superstition (2a)
Большой русско-английский фразеологический словарь. — М.: ACT-ПРЕСС КНИГА. С.И. Лубенская. 2004.