You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
Two analogies that relate actions with their consequences are given in the form "A : B. C : ?". The phrase "A : B" relates action A to consequence B. Your task is to replace the question mark (?) with the appropriate consquence of the given action C, following the "A : B" relation. Your answer should be a single verb, without further explanation.

throw : fly. aspire : ?
Solution: attain
Why? Fly is a causation of throw. Hence, the inferred analogy being causation, attain is the causation of aspire.

New input: listen : hear. trip : ?
Solution:
stumble