nervine meaning
ENFR nervine 
- NounPLnervinesSUF-ine
- Adjective
- (medicine) Having the quality of acting upon or affecting the nerves; quieting nervous excitement.
- (medicine) Having the quality of acting upon or affecting the nerves; quieting nervous excitement.
Definition of nervine in English Dictionary
- Part-of-Speech Hierarchy
- Adjectives
- Uncomparable adjectives
- Uncomparable adjectives
- Nouns
- Countable nouns
- Countable nouns
- Adjectives
Source: Wiktionary
Grammatically, this word "nervine" is an adjective, more specifically, an uncomparable adjective. It's also a noun, more specifically, a countable noun.