Always serious and private to the point of secretiveness.

总且私密到近乎隐。

The vast secretiveness of it vibrated to herself.

它的巨大密震动了她自己。

What I wonder at is, rather your secretiveness than your courage.

我想知道的你的密, 而不你的勇气。

Whenever she was unhappy she felt herself at bay against a pitiless world, and a kind of animal secretiveness possessed her.

每当她不开心时， 她就觉得自己与这个无情的世界格格不，动物般的神感占据了她。

It can erode the trust between children and adults, potentially leading to increased secretiveness or rebelliousness.

它会侵蚀儿童和成人之间的信任，可能导致隐或叛逆的增加。