to speak at length about a topic
parler longuement d'un sujet (parler longuement d'un sujet)
"He loved to hold forth on travel stories."
"Il adorait parler longuement d'un sujet sur les histoires de voyage." (Il adorait parler longuement d'un sujet sur les histoires de voyage.)
something that is very easy to do
to repair a damaged relationship
to politely disagree with someone
a person who is the first to do something innovative
to achieve great fame or success
disappointed but having learned from the experience