Antonyms for the term "am obtainable" would include phrases like "am not accessible," "am unattainable," and "am not achievable." These phrases indicate that it may be difficult, if not impossible, to obtain whatever it is that is being referred to. Some other antonyms might include "am out of reach," "am beyond reach," and "am unobtainable." These antonyms can refer to both physical objects or abstract concepts, such as goals or dreams that are difficult to achieve. Essentially, any phrase that implies that something can't be easily or readily obtained would serve as an antonym for the term "am obtainable.