(idiomatic) to serve as the other party to someone who needs advice; to give advice; to provide consultation

(animal husbandry) mounting (as in animal copulation) / (rare, engineering) mounting (as in a piece of equipment)

(animal husbandry) to mount (as in animal copulation) / (rare, engineering) to mount (as in a piece of equipment)

(idiomatic) to get carried away, to become overexcited

boarding the wrong vehicle; misboarding

to board the wrong vehicle; to misboard

trolleybus