Questions & Answers about Ljuset i rummet är helt blått.
Why is it blått with a double 't' instead of just blåt?
The base adjective is blå, which ends in a stressed vowel. Because it describes ljuset (an ett word), it needs a neuter ending. For adjectives ending in a stressed vowel, you add -tt instead of a single -t. This also signals that the vowel sound becomes short.
Why is the word helt used here rather than hel?
In this sentence, helt acts as an adverb meaning 'completely' and it modifies the adjective blått. To turn an adjective like hel (whole or complete) into an adverb, you use its neuter form by adding a -t.
Both ljuset and rummet end in -et. Does that mean they are both neuter nouns?
Yes, both ett ljus (a light) and ett rum (a room) are neuter words. They take the -et ending to become definite ('the light', 'the room'). Because the main subject ljuset is neuter, the adjective describing it at the end of the sentence must be the neuter form blått.
Why does rummet have two 'm's when the root word is just rum?