Could someone provide a short explanation of the connotation(s) of "trives"? What would the difference be between this sentence and "Er hun glad å være der?" I think that the latter means something like "Is she happy where she is?" (i.e. Does she feel emotionally satisfied?) whereas "Trives hun der?" is more of a physical feeling (Is she comfortable?) What verb would one use to say "have fun"/"have a good time" on a particular occasion (i.e. at a party)?
"Trives" implies that the one is having an easy time doing something, "Man trives med det man gjør."
"Glad" is usually associated with being happy in a grateful way, "Jeg er glad i deg" or "Hun er glad for det."
"Lykkelig" means to feel free and happy, "En dag skal jeg bli lykkelig."
"Fornøyd" means happily satisfied, "Hvor fornøyd er du med ditt nye hjem?"
Seems like nobody answered you. Actually, possessive pronouns also trigger the weak declension. Arguably because it's clearer which specific home you mean (yours as opposed to mine), thus being rendered definite. If that helped, I'm glad, if you lready knew by now, nothing lost. Win-win. G'day to you