To be under an obligation to give something back to someone or to perform some action for someone.
To have as a cause; used with to.
To have debt; to be in debt.
To commit oneself (to an obligation, activity etc.).
To pass a slower moving vehicle on the curbside rather than on the side closest to oncoming traffic.
To take upon oneself; to start, to embark on (a specific task etc.).
The passing of slower traffic on the curbside rather than on the side closest to oncoming traffic.