exasperation
Concise Oxford English Dictionary © 2008 Oxford University Press:
exasperate /ɪgˈzasp(ə)reɪt, ɛg-/
▶verb irritate intensely.
– derivatives
exasperated adjective,
exasperatedly adverb,
exasperating adjective,
exasperatingly adverb,
exasperation noun.
exasperated adjective,
exasperatedly adverb,
exasperating adjective,
exasperatingly adverb,
exasperation noun.
– origin C16: from L. exasperat-, exasperare ‘irritate to anger’.
'exasperation' also found in these Oxford entries:

