brittle

易碎的、脆的

The old plastic pipe had become brittle and cracked easily.

那条旧塑胶水管已经变脆，一碰就裂。

脆弱的、不稳固的

The ceasefire is brittle and could collapse at any moment.

停火协议十分脆弱，随时可能破局。

冷淡的、生硬的、勉强的

She answered with a brittle laugh and changed the subject.

她生硬地笑了一声，就把话题转开了。

脆糖、硬糖片

We made peanut brittle and broke it into small pieces.

我们做了花生脆糖，再把它敲成小块。