Espouse:–verb (used with object), -poused, -pous⋅ing. 1. to make one’s own; adopt or embrace, as a cause.
Expound: –verb (used with object) 1. to set forth or state in detail: to expound theories.
2. to explain; interpret.
Expostulate: –verb (used without object), -lat⋅ed, -lat⋅ing. to reason earnestly with someone against something that person intends to do or has done; remonstrate