I've noticed that the new neighbor is very seclusive; nobody knows much about him, and he hardly ever comes out of his house.
2.
After two years in Paris, Fiona found the city became almost seclusive, and it was hard to convince her to go out anymore.
3.
Monica always tends to be seclusive during her period of writing; it's as if she enters a world of her own where nothing else matters.
4.
Our reclusive uncle has been living in solitude for so long that he's become quite seclusive and aloof, both physically and mentally.
5.
After her breakup, she found herself to be seclusive, resisting attempts from friends to go out and have fun; she was too caught up in her own sorrows.