What is another word for most second-nature?
Pronunciation: [mˈə͡ʊst sˈɛkəndnˈe͡ɪt͡ʃə] (IPA) 
There are plenty of synonyms that can be used to describe something that is the "most second-nature." Some options include "effortless," "instinctive," "automatic," "unconscious," and "intuitive." These words all point to the idea that a task or skill has been so thoroughly ingrained in someone's mind or body that it is almost reflexive. Other possible synonyms might include "inherent," "innate," "intrinsic," or "natural," all of which convey the sense that the behavior or ability in question is an inherent part of someone's being. Overall, there are many different ways to express the idea of something being "most second-nature," each with its own subtle shades of meaning.
