plaintive meaning
EN
[pleɪntɪv] FR plaintive 
- AdjectiveCOMmore plaintiveSUPmost plaintiveSUF-ive
- Sounding sorrowful, mournful or melancholic.
- A typically plaintive song from Radiohead.
- Sounding sorrowful, mournful or melancholic.
Definition of plaintive in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Adjectives
- fr plaintive
- fr plaintives
- en plaintively
- fr plaintivement
- en plaintiveness
Source: Wiktionary
Grammatically, this word "plaintive" is an adjective.