他说话的语气让人感觉不舒服。

Tā shuōhuà de yǔqì ràng rén gǎnjué bù shūfu.

The way he speaks makes people uncomfortable.

他说话的语气很凶。

Tā shuōhuà de yǔqì hěn xiōng.

He speaks in a very harsh tone.

他的语气很严肃，听起来很生硬。

Tā de yǔqì hěn yánsù, tīng qǐlái hěn shēngyìng.

His tone is very serious and sounds rigid.