understanding, comprehension / appreciation

public and private, official and private

distinction, difference / classification

to distinguish, to tell one thing from another / to classify

tight / reliable

stable, fulfilled

be fast, securely in place / be reliable, level-headed / keep going, keep trying

understand, comprehend / appreciate

fast (in a firm or secure manner), tightly / surely, unwaveringly, steadily, reliably

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend