あるかなきか

expression

barely there; almost nonexistent

Describes something so faint, small, or subtle that it is practically absent. Often used with nouns like 差 (difference), 可能性 (possibility), or 程度 (degree).

• 両りょう者しゃの間あいだには、あるかなきかの差さしかない。

  There is only a barely perceptible difference between the two.

• 成せい功こうの可か能のう性