(Latin: a suffix; tending to, characterized by)

adventitious (adjective)
1. Of the nature of an addition from without; extrinsically added, not essentially inherent; supervenient, accidental, casual.
2. Appearing casually, or out of the normal or usual place; especially, in botany of roots, shoots, buds, etc. produced in unusual parts of the plant.
3. Not in the usual order or place.
4. Not natural or hereditary; such as, roots that form on stems, a growth of hair where it usually does not grow, or the growth of a plant in a foreign habitat.
expeditious (ek" spi DISH uhs) (adjective), more expeditious, most expeditious
1. Descriptive of something that is prompt, speedy, immediate, and efficient: This emergency warning of an epidemic requires expeditious action so more people can avoid getting sick.
2. A reference to an answer that is quickly given: Jim gave his mother an expeditious response to her question as he was leaving to catch his bus to go to school.
3. Etymology: whenever anyone is expeditious (fast) about doing anything, it is because that person's feet are not tied up. This is because the Latin word pes (a stem of ped) means "foot" and ex means "out of".
fictitious (adjective), more fictitious, most fictitious
1. Relating to not being true or genuine, and intended to deceive or used for tricking people.
2. Pertaining to being invented by someone's imagination; especially, as part of a work of fiction.
3. Referring to not being genuinely believed or felt; a sham: Margaret greeted her brother with fictitious enthusiasm.
4. Etymology: as a type of literature, about 1599: fictitious is from about 1615; from Middle Latin fictitus, a misspelling of Latin ficticius, "artificial, counterfeit"; from fictus, past participle of fingere.