This is the 525th most frequent Dutch word.
halve
"Halve" in Dutch means "half" in English.
In this sentence, 'halve' is used as an adjective to describe the portion of pizza being eaten.
We eten een halve pizza als lunch.
We eat a half pizza as lunch.
Here, 'anderhalve' is a numerical expression indicating one and a half units of time.
De wedstrijd duurde anderhalve dag.
The match lasted one and a half days.
In this idiomatic expression, 'halve' colloquially represents incomplete actions or measures.