my poor abilities; my meager talents
Humble self-deprecating term used to refer to one's own abilities or intelligence. Often used in formal or polite contexts to show modesty.
With my poor abilities, I don't think I can solve this problem.
It is beyond my meager talents, but I will do my best.
Compound of 愚 (gu, 'foolish') and 才 (sai, 'ability, talent'). The exact historical derivation is uncertain, but it follows a common pattern of humble self-deprecating compounds in Japanese.