The word "koll" can be spelled with two possible consonant sounds depending on its origin. If it comes from the English language, it is spelled with a /k/ sound as in "car". On the other hand, if it originates from a Scandinavian language, it is spelled with a voiced velar fricative sound represented as /ɣ/. Moreover, the pronunciation of the vowel sound may vary as well depending on the language or dialect. Therefore, the correct spelling of "koll" depends on its etymology and pronunciation.
The etymology of the word "koll" or "Koll" is derived from the Old Norse term "kǫllr", which means "bump" or "hill". This Old Norse word eventually evolved into the modern Icelandic term "kollur" or "koll" with the same meaning.