1.

1. 悲哀的：plaintiff 原告 | plaintive 悲哀的 | plait 辫子

2. 哀怨的：attentive 注意的;有礼貌的 | plaintive 哀怨的 | locomotive 火车头,机车

3. plaintive的近义词

3. 可怜的/悲哀的/哀愁的/哀诉的/悲哀/哀怨：plaintiff /原告/ | plaintive /可怜的/悲哀的/哀愁的/哀诉的/悲哀/哀怨/ | plaintively /可怜地/悲伤地/

4. 悲哀的, 哀伤的 (形)：plaintiff 起诉人; 原告 (名) | plaintive 悲哀的, 哀伤的 (形) | plaintively 悲哀地, 哀怨地 (副)

1. 悲伤的；哀怨的
    A plaintive sound or voice sounds sad.

plaintive的解释

    e.g. They lay on the firm sands, listening to the plaintive cry of the seagulls...
           他们躺在硬实的沙地上，听着海鸥的哀鸣。
    e.g. Her voice was small and plaintive.
           她的声音微弱而哀伤。

1. expressing sorrow

    Synonym: mournful