After two years of miserable struggle, I was forced to face the fact that I simply did not have the acumen for university studies.
acer acris (sharp, pungent, bitter, eager, fierce) (Latin)
acumen sounds like IQ-men. men with high IQ have ability to judge quickly (has keen insight). acumen sounds like "IQ-man" or "a quick man" which grasps quickly ACUTE+MIND. acute means sharp