How do you say sad in Chinese?
— 哀傷, 哀伤 (āishāng), 悲傷, 悲伤 (bēishāng), 憂傷, 忧伤 (yōushāng)

Related synonyms for sad in Chinese
sorry對不起, 对不起 (duìbùqǐ), 抱歉 (bàoqiàn), 不好意思 (bù hǎoyìsi)
Similar to for sad in Chinese
bad壞, 坏 (huài)