طَالَمَا أَيْقَظَكَ الدَّهْرُ فَتَنَاعَسْتَ
Time has often roused you, yet you acted drowsy.
Ayqaẓa means to wake someone. Tanāʿasta conveys behaving as if sleepy or slipping into drowsiness. Al-dahr, time, is pictured as an agent that wakes the sleeper through experience.
The contrast is between being alerted and feigning inattention. Events have supplied warnings; the hearer has chosen to respond as though nothing had happened.