This is the 481st most frequent Icelandic word.
köflum
"Köflum" means "in sections" or "in parts" in English.
In this sentence, 'köflum' refers to sections or parts, indicating a division of a subject.
Við rættum málið í ýmsum köflum.
We discussed the matter in various sections.
'Kaflar' is the plural nominative form of 'kafli,' and 'köflum' would be the dative plural, used if the preposition or verb required that case.
Bókin er mjög áhugaverð, sérstaklega sumir kaflar.
The book is very interesting, especially some chapters.
Here, 'köflum' acts as the dative plural case of the noun 'kafli,' aligning with the prepositional phrase usage.