اِشْتَدّ: اِسْتَحْكَمَ، اِسْتَفْحَلَ، زَادَ، قَوِيَ to intensify, heighten, increase, grow, build up, strengthen; to become aggravated; to be or become strong(er), severe(r), (more) intense, (more) serious

اِشْتَدّ سَاعِدُهُ: قَوِيَ to become strong, powerful, robust, vigorous

اِشْتَدّ على (العَدُوّ): حَمَلَ على، هَاجَمَ to attack, assail, assault, charge, raid, bear down upon, fall upon, rush upon