The spelling of the word "Zarinda" can be explained using the International Phonetic Alphabet (IPA). The first sound is a voiced alveolar fricative /z/, followed by an open mid-back vowel /ɑ/, then a post-alveolar approximant /ɹ/ and finally an unvoiced dental fricative /θ/. So the correct spelling of "Zarinda" is evident from these phonetic sounds. This word is not very common, but it might have its origins in Hindi or Persian languages, where it is common to use the letter "z" to indicate a buzzy pronunciation of the sound.