Depends on where it is used. 中 /na ka/ can mean 'in, inside, in the middle of' (the same kanji has other readings like 'chuu' or 'uchi' which can mean 'in the midst of, while, meanwhile, etc').
Another case would be 仲 /na ka/ which means 'relationship, terms' as in 仲良く /na ka yo ku/ or 仲がいい /na ka ga ii/ meaning 'close, on good terms with, getting along well, etc'