Questions & Answers about Ekki rugla mér saman við systur mína; við erum ekki eins.
In Icelandic, ekki + infinitive is a very common way to give a negative command:
Ekki rugla ... = Don’t confuse ...
So even though rugla is the infinitive, the whole expression works as a prohibition or warning. You can also hear forms like Ruglaðu ekki ..., but Ekki rugla ... is extremely natural and common.
This is a fixed expression:
rugla einhverjum saman við einhvern = to confuse someone with someone
Its parts are:
- rugla = confuse, mix up
- einhverjum = someone, in the dative
- saman = together / mixed up
- við einhvern = with someone, after the preposition við
So the whole structure is not just word-for-word; it is an idiomatic pattern you learn as one unit.