This is the 346th most frequent Icelandic word.
mati
The Icelandic word "mati" means "assessment" or "opinion" in English.
In this sentence, 'mati' is an inflected form of the word 'mat' meaning judgement or evaluation, used here in the dative case after the verb 'treysta' (trust).
Ég treysti þínu mati.
I trust your judgement.
Here, 'mati' refers to the process of evaluation, specifically standing for an 'assessment' in a grammatical context where it modifies the noun phrase.
Mati á árangri nemenda er mikilvægt.
Assessment of students' performance is important.
In this case, 'mati' represents the act or instance of evaluating, conveying the meaning of an evaluative meeting or consideration.