So Dutch/German make "begreif" a verb, for Swedish it is just a noun (that means "concept").
But "begrijpelijk" has a clone: "begriplig". An adverb based on a verb in a foreign dictionary. There is no verb that goes "begreppa", it's just "greppa".
"Jag kan inte begripa svenska."
Oh, you're right.
The term concept itself suggests grasping or holding/taking hold of, see the latin verb concipio or adjective conceptus.
Dutch also has a noun ("begrip") meaning "notion" or "understanding".