understanding, comprehension / appreciation

vague / obscure / desert / wide

understand, comprehend / appreciate

explanation

to explain

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

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

impossible to understand, utterly confused

instruction manual / explanation paper