The correct spelling of the phrase "am talented" can be explained using IPA phonetic transcription. "Am" is pronounced as /æm/ with the short "a" sound followed by the "m" consonant. "Talented" is pronounced as /ˈtæləntɪd/ with stress on the first syllable and the short "a" sound followed by the "l" and "n" consonants. The "e" in the second syllable is pronounced as a schwa /ə/. So, the correct spelling for this phrase is "am talented" with the short "a" sound and a stress on the first syllable of "talented".
The phrase "am talented" does not have a specific etymology of its own. However, the word "talented" originates from the Old English word "talent", which meant "inclination, disposition, or will". It later evolved into Middle English as "talent" with the same meaning. In the 16th century, the term gained the additional sense of "gift or natural endowment of ability". Over time, "talented" emerged as an adjective to describe someone possessing these natural abilities or talents.