The adjective “adventitious” has nothing to do with adventures or taking risks — it describes something coming from an external source rather than originating from within, or happening out of the ordinary location/order. It comes from the Latin “adventīcius,” meaning “coming from outside, external, foreign.” It might be used in a general sense, talking about added perks or outside influences, and it also has more scientific usages. In botany, adventitious plants might be found outside of their normal growth locations, and in medicine, someone might have adventitious breath sounds, for example.