To use force, threat, fraud, or intimidation in an attempt to compel one to act against their will.
To restrain by force, especially by law or authority; to repress; to curb.
To force an attribute, normally of a data type, to take on the attribute of another data type.
To constrain someone by force or by social, moral or legal means.
To be indebted to someone.
To do (someone) a service or favour (hence, originally, creating an obligation).