The correct spelling of the word "Wainable" is actually "Waneable". The word is derived from the verb "wane", which means to decrease in size or intensity. The suffix "-able" is added to the end of the word to make it an adjective, meaning capable of waning or able to wane. The phonetic transcription of this word is /weɪnəbəl/, with the stress on the first syllable. So next time you spot the word "Wainable", remember it should be spelled "Waneable".