Betoken
Part of speech: verb
Definition: Signify by some visible object; show by signs or tokens. Foreshow by present signs; indicate something future by that which is seen or known.
Signal
Part of speech: noun
Definition: An indication given to another person.An on-off light, semaphore, or other device used to give an indication to another person.(of a radio, TV, telephone, internet, etc) An electrical or electromagnetic action, normally a voltage that is a function of time that conveys the information of the radio or TV program or of communication with another party.Useful information.
Part of speech: verb
Definition: To indicate.
Example sentence: Failure has never been a signal for me to quit; it's always been a sign for me to go down another path.