تَوَكُّل
tawakkul
reliance upon Allah; trust
وـكـل
Most Arabic words are built from a small set of root letters — knowing the root helps you recognize related words across the dictionary.
وَعَلَى اللَّهِ فَتَوَكَّلُوا
And upon Allah rely, if you are believers (Quran 5:23)