Possible Results:
runruneaba
-I was humming
Imperfectyoconjugation ofrunrunear.
Imperfectél/ella/ustedconjugation ofrunrunear.

runrunear

El motor runruneaba produciéndome tanto sueño que apenas podía mantener los ojos abiertos.
The engine burred making me so sleepy I could hardly keep my eyes open.
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