understanding, comprehension / appreciation

difficult / hard, probably impossible

to pretend not to know / to be absent-minded; to be weak-minded / to be silly and amusing

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

instruction manual / explanation paper