a hospital (large medical facility)

病友: a sick friend, a friend who is ill; different people who have the same disease (not necessarily friends)

together, with

combined, merged, unified

combination; a state which is combined / meeting

a sick friend, a friend who is ill / different people who have the same disease (not necessarily friends)

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

there are many, there is much, there are numerous