意兴

tā yì xìng lán shān

他意兴阑珊。

He feels dispirited.

yì xìng bó bó

意兴勃勃

be highly enthusiastic

nǐ de lái xìn zhōng chōng mǎn zhe lìng wǒ yì xìng suǒ rán de wù hé shì

你的来信中充满着令我意兴索然的物和事。

Your letters are full of things that do not interest me.