hillier

Hillier is a comparative adjective in English meaning more hilly or consisting of more hills. It is formed from the noun hill by adding the comparative suffix -ier; the standard form is hillier, used without more. For example: the route becomes hillier as you ascend, or the hillier sections of the trail.

In geography and travel writing, hillier terrain denotes landscapes with a larger number of hills or steeper elevations than surrounding areas. The term is typically used to compare two or more regions, routes, or landscapes, and may be used in contrast with flatter or less rugged terrain. While hillier is the common form, some writers also use the phrase more hilly, though this is less idiomatic in many contexts.

Hillier is also a surname and toponym. As a surname, Hillier is of English origin and is associated with families historically connected to living on or near a hill. The name appears in various English-speaking countries and has given rise to place names in some regions, reflecting historical ties to a hill or to families bearing the name.

See also: hilly, hillside, hill.