narrower
Narrower is the comparative form of the adjective narrow. It describes something that has less width or breadth than another object, or something that has a more restricted scope or degree.
In physical contexts, narrower can describe dimensions such as a street, corridor, or doorway that is thinner
Morphology and usage notes: narrower is formed by adding the suffix -er to the base adjective narrow.
Related terms include narrowing (the present participle or gerund form), narrowness (the noun form), and compound