Fare

If you have a summer trip planned, there will be fares involved: airfares, train fares, bus fares, and taxi fares. In Old English, “fare” was the verb meaning “travel” (as the German “fahren” still does). So “farewell” actually meant, “Have a good trip!”. The verb now survives only in the phrases “fare well (or badly)” and in “seafarer”. The noun “fare” has survived better; originally designating a trip, it subsequently became the price you pay for one.