Answer: aere

AnswerCrossword Clue
AEREIn bronze: Latin.
AERE... perennius (more lasting than bronze).
AEREVia ..., on Italian airmail.
AERE... perennius (more enduring than bronze): Lat.
AERE... perennius (more lasting than bronze): Lat.
AERE... perennius (more enduring than bronze).