A presage is a sign that something bad is about to happen, like when you get that queasy feeling in your stomach because your mom found out you skipped band practice to go to the movies.
Presage, pronounced "PREH-sige," can be a noun or a verb. As a noun, presage is a warning or omen of bad things to come, like a strange quiet and stillness in the air, presage to the coming tornado. As a verb, presage means "making a prediction or giving a warning of what's to come," like a terrible end-of-season football game's outcome game that presaged the struggles the team faced the next season.