Mat 13:9 Who has ears to hear, let him hear.
ho (those) echo (have) ous (ears) akouo (hear) akouo (hear).

Christ is telling his audience that there is more here than meets the ear. He is saying that you must pay attention to understand.

Alternative version: Those who have understanding listen to understand.

"Ear" is ous in the Greek. The term is also a metaphor for understanding.

"Hear" in both instances is akouô, which means "to hear," "to listen," and "to understand."