Words of this stem all have the basic sense of ability or capability. dýnamai means a. “to be able” in a general sense, b. “to be able” with reference to the attitude that makes one able, hence sometimes “to will,” and c. (of things) “to be equivalent to,” “to count as,” “to signify.” dynatós means “one who has ability or power,” “one who is powerful”; the neuter adjective signifies “what is possible or practicable.”