idea, belief p.v. to think. Akala ko'y kumain ka na. I thought you had already eaten.
v.
mag-akala, akalain (mag-:-in) to believe, to presume, to think, to conceive, to imagine. Huwag kang mag-akalang ako ay taksil. Don't get the idea that I'm unfaithful. Baka akalain mong ako ay taksil. You might think I'm unfaithful.