Questions & Answers about Ég giska á að hún komi seint.
Giska á means to guess, to estimate, or to make a prediction about.
In this sentence, Ég giska á að... is basically I guess that... or My guess is that...
A useful thing to remember is that giska normally appears with á in this meaning, so you learn it best as a unit: giska á.
They do different jobs:
- á belongs to the expression giska á
- að introduces the subordinate clause, meaning that
So the structure is:
Ég giska á + að hún komi seint
In other words:
- giska á = guess
- að hún komi seint = that she will/is likely to come late
This is not the infinitive marker að. Here it is a conjunction meaning that, because it is followed by a finite verb: komi.