It airs is incorrectly written and it should be written as "he boasted" being its meaning:
The first person singular or third-person singular preterite imperfect of the verb indicative is boast, as it is always thoughtful and means showing off to others or boast the merits or qualities. Its etymology is Latin: vanus empty vanum: empty, hollow and glorior gloriaris gloriari: boast, enlarge it: proud in vain.
