Questions & Answers about Handritið er gott.
Because Icelandic usually adds the definite article to the end of the noun instead of using a separate word like the.
- handrit = manuscript
- handritið = the manuscript
The ending -ið here is the definite article for a neuter singular noun in the nominative.
You usually learn the gender as part of the noun. In dictionaries, Icelandic nouns are normally marked as:
- m. = masculine
- f. = feminine
- n. = neuter
Handrit is a neuter noun, and that affects:
- the form of the definite article: handritið
- the form of the adjective: gott
So the gender of the noun controls agreement in the sentence.