It's hard to relate to someone who has such wild/extreme 'mood swings'. [=someone whose mood changes very quickly]
She turned down the lights and lit a candle to create a more romantic 'mood'. [='atmosphere']
I'm sorry. I'm just not 'in the mood to talk'. [=I do not want to talk to anyone right now]
(..) Shhh... Mrs Ianosi... Can't you see that you are waking up all the HQ? Let's go upstairs. And when they bombed the castle... My mood did not worsen at all. I kept laughing on and on. They thought i was crazy. Madam... i want to ask you... Don't go. You stay here. Don't leave me. (..)1965 Forest of the Hanged