disertar bedeutet auf Englisch

discourse [discoursed, discoursing, discourses]▼(write or speak formally and at length)
verb
[UK: ˈdɪs.kɔːs] [US: ˈdɪs.kɔːrs]

expound [expounded, expounding, expounds]▼(explain or discuss at length)
verb
[UK: ɪk.ˈspaʊnd] [US: ɪk.ˈspaʊnd]

orate [orated, orating, orates]▼(to speak formally; to give a speech)
verb
[UK: ɔː.ˈreɪt] [US: ɔːr.ˈreɪt]