bilið
Bilið is the definite singular neuter form of the Icelandic noun bil, a word that means space, gap, interval, or difference between two things. In general usage, bilið denotes a specific, identifiable space or gap, whether it is physical, temporal, or abstract. The definite form is used when the space in question has been mentioned or is otherwise understood from context, for example bilið milli tveggja húsa meaning the space between two houses.
Bilið appears in many everyday phrases. Examples include bilið milli tveggja húsa (the space between two houses)
Etimology and grammar: bilið is derived from bil, a neuter noun in Icelandic. The definite suffix -ið
In summary, bilið denotes a definite, specific gap or interval and is a standard term in Icelandic