In the Genki I textbook, it says that the i and the u vowels are sometimes dropped when placed between voiceless consonants or at the end of an utterance preceded by voiceless consonants.
The example given, すきです, demonstrates both points.
Currently, I am learning about adjectives and was wondering whether the vowel drop is also applied to adjectives (or words in general) that end in "いい", for example かわいい and うれしい.
Since the i is at the end of an utterance preceded by voiceless consonants in both examples, I believe that the vowel drop is acceptable. Therefore, is it appropriate in speech to say "kawaides" and "ureshides" or do I have to say the long i-vowel?