وَأَذْكَرَكَ الْمَوْتُ فَتَنَاسَيْتَ
Death reminded you, yet you behaved as though you had forgotten.
Adhkaraka means to remind you; tanāsayta suggests behaving as though forgetful or deliberately putting a reminder aside. Death is personified as a reminder, not described as a literally speaking person.
The last pair has particular force: even awareness of mortality may be dismissed. It gathers the preceding examples of refusal into one final image.