This is the 537th most frequent Swedish word.
halv
"Halv" in Swedish means "half" in English.
Here, 'halv' is used to indicate half past the previous hour when telling time.
Jag vaknade halv sju i morse.
I woke up at half past six this morning.
In this sentence, 'halv' indicates a quantity equivalent to 50% of a unit.
Ett halv kilo räcker för att mata hela gruppen.
Half a kilo is enough to feed the whole group.
Here, 'halv' is used as a prefix to convey that the attribute (goodness) was partial or moderate.