Explanation
ALLAH is Al-Wakeel, The One and only One who can be entrusted with the management and resolution of all affairs. He is The One who is the supreme trustee, guardian, and administrator of all things.
He is The One who may be trusted to do better for us than we can do for ourselves, The One who can be entrusted to provide the perfect resolution for all matters.
The root word waw-kaf-lam has various Arabic connotations such as to appoint or entrust for the care or management of something, to have a commissioned agent, a guardian of one’s interests, to rely upon, confide in, lean upon, or submit to.
This same root also gives rise to the word tawakkul (or tawakul), which indicates submitting to ALLAH, relying upon ALLAH, and putting one’s trust in ALLAH.
Quran References
Those to whom hypocrites said, “Indeed, the people have gathered against you, so fear them.” But it [merely] increased them in faith, and they said, “Sufficient for us is Allah, and [He is] the best Disposer of affairs.” (Quran 3:173)
O People of the Scripture, do not commit excess in your religion or say about Allah except the truth. The Messiah, Jesus, the son of Mary, was but a messenger of Allah and His word which He directed to Mary and a soul [created at a command] from Him. So believe in Allah and His messengers. And do not say, “Three”; desist – it is better for you. Indeed, Allah is but one God. Exalted is He above having a son. To Him belongs whatever is in the heavens and whatever is on the earth. And sufficient is Allah as Disposer of affairs. (Quran 4:171)
[Moses] said, “That is [established] between me and you. Whichever of the two terms I complete – there is no injustice to me, and Allah, over what we say, is Witness.” (Quran 28:28)
[He is] the Lord of the East and the West; there is no deity except Him, so take Him as Disposer of [your] affairs. (Quran 73:9)