怖くなかった — Wasn't [this] scary? Negative past tense

怖こわくなかった

Wasn't [this] scary? Negative past tense for i-adjectives: Replace the last -i with -kunakatta. Refresher: For na-adjectives / nouns: Add janakatta.

Card 94 of 2,076 in Tae Kim's Japanese Grammar.

More from Tae Kim's Japanese Grammar

長ながかった

危あぶなかった

怖こわい

おいしい

Double vowels (ii in this case) are pronounced long. Note that the "ii" in this case results from two different Japanese characters: shi/し + i/い.

美味おいしかった

おいしくない