Bilboko

Bilboko is a Basque language adjectival form meaning "of Bilbao" or "Bilbao's." It is used to indicate a relationship to the city of Bilbao and is formed from the Basque name Bilbao plus the suffix -ko, which marks possession or association in Basque. The form Bilboko typically accompanies a noun in a Basque noun phrase to express that the noun relates to Bilbao.

Linguistically, -ko is one of several suffixes that Basque uses to create modifiers from proper names. Bilboko, like other -ko forms, signals origin, affiliation, or belonging. In Basque syntax, such adjectives generally precede the noun they modify, functioning similarly to the English constructions "of Bilbao" or "Bilbao's" in appropriate contexts.

Usage examples include common place-name and institutional phrases. Bilboko kaleak means "the streets of Bilbao" or "Bilbao's streets," illustrating possession or association with the city. Bilboko udala, literally "the Bilbao City Council," is another frequent usage, referring to the municipal government located in Bilbao. These forms are typical in Basque-language texts, signage, and administrative terminology.

In contexts outside the Basque language, Bilboko would typically be rendered as "de Bilbao" in Spanish or translated as "of Bilbao" in English. The term illustrates how Basque toponymy and administrative naming rely on morphological attachment of such suffixes to proper names to build descriptive phrases.

See also: Basque language, Bilbao, Basque toponymy.