Breakdown of Hún athugaði útsvarið því að launamiðinn var rangur.
Questions & Answers about Hún athugaði útsvarið því að launamiðinn var rangur.
Athugaði is the past tense of the verb að athuga, which means to check, to examine, or to look into.
In this sentence, hún athugaði means she checked.
A learner may notice that many Icelandic past-tense weak verbs end in -ði or -di, and athugaði is a good example of that pattern.
Hún is the nominative singular form of the feminine pronoun she. It is used because it is the subject of the sentence — the person doing the action.
So in:
Hún athugaði ...
= She checked ...
If the pronoun were in a different grammatical role, Icelandic would use a different case form.