The Hebrew verb yakol means to be able, have power, prevail, or endure. It occurs approximately 193 times in the Old Testament and expresses capacity, capability, or the power to accomplish something. It is frequently used with other verbs to indicate whether someone can or cannot perform a given action.
Yakol highlights the contrast between human limitation and divine omnipotence. Humans frequently find they are "not able" to do what God requires on their own strength, while God is always able to accomplish His purposes. The word appears in crucial moments of faith and doubt — when the spies declared they could not take the Promised Land (Numbers 13:31), when Jacob wrestled and prevailed (Genesis 32:28), and in contexts where God demonstrates that nothing is too hard for Him.