more reclusive

It was there that he developed his checkerboard model, examining the interactions among various groups at the internment camps: the “clannish” Nisei; children of Japanese immigrants; more reclusive detainees; and camp administrators.

I've become a bit more reclusive.

Geffen has become more reclusive in recent years, first visiting the Geffen Theater at the Academy Museum of Motion Pictures in Los Angeles this month — a year after its red-carpet opening.

“He was always very quiet and never much said anything,” said Ms. Williams, who added that Mr. Gendron was “book smart” but had grown more reclusive over the years since she met him in elementary school.

The novel, “Bonds,” by a chap called Harold Vanner, is the tale of Benjamin and Helen Rask — thinly disguised stand-ins for Bevel and his wife, Mildred — early 20th century Manhattan bigwigs who grow richer and more reclusive in tandem until Helen dies, mad and logorrheic, in a Swiss sanatorium.