Questions & Answers about Burðarólin er sterk.
The base form is burðaról. The ending -in is the suffixed definite article, so it makes the noun definite: the carrying strap.
Icelandic usually puts the at the end of the noun instead of using a separate word the way English does.
- burðaról = carrying strap
- burðarólin = the carrying strap
Burðaról is a compound noun.
- burður means carrying / transport
- ól means strap
In compounds, the first part often appears in a linking form, very often related to the genitive. So burðar- is the compound form that gives the sense of carrying- or for carrying.
So the whole word literally means something like carrying-strap.
It is feminine.
That matters because adjectives in Icelandic must agree with the noun in gender, number, and case. In this sentence, that is why the adjective appears as sterk.