δυνατέω, -ῶ; (δυνατός); to be powerful or mighty; show oneself powerful: 2 Corinthians 13:3 (opposed to ἀσθενῶ); to be able, have power: followed by an infinitive, Romans 14:4L T Tr WH; 2 Corinthians 9:8L T Tr WH. Not found in secular writings nor in the Sept.