The spelling of the phrase "am apt" is straightforward when using the International Phonetic Alphabet (IPA). "Am" is spelled as /æm/, which represents the sounds "a" as in "cat" and "m" as in "mom." "Apt" is spelled as /æpt/, which represents the sounds "a" as in "cat" and "pt" as in "kept." When said together, "am" and "apt" form the phrase /æm æpt/, which can be pronounced as "am apt." The phonetic transcription of a word helps to understand its pronunciation accurately.
The phrase "am apt" is not a separate word, but a combination of two words: "am" and "apt". "Am" is the first-person singular present tense of the verb "to be" in English, while "apt" is an adjective.
The word "apt" originated from the Latin word "aptus", meaning "fit" or "appropriate". It passed through Old French before being adopted into Middle English, where it retained its meaning of suitability or fitness for a specific purpose. Thus, when someone says "I am apt", they are saying they are fitting, suitable, or well-suited for something.