cad-, cas-, cid-

(Latin: to fall, befall)

incidence
incident
incidentally
ocassionally
occasion
1. A particular time; especially, as marked by certain circumstances or occurrences: "They met on three occasions."
2. A special or important time, event, ceremony, celebration, etc.: "His birthday will be quite an occasion."
3. A convenient or favorable time, opportunity, or juncture: "This slack period would be a good occasion to take an inventory."
4. The immediate or incidental cause or reason for some action or result: "What is the occasion for this noise?"
occasional
Occasionem cognosce.
Recognize opportunity.

Another translation: "Strike while the iron is hot."

occident
Etymology: from Old French occident (12th century), from Latin occidentem, "western sky, part of the sky in which the sun sets", originally "setting"; occidere "fall down, go down (a reference to the sun"; from ob-, "down" plus cadere, "to fall".
occidental
1. Western; as opposed to oriental; pertaining to the western quarter of the hemisphere, or to some part of the earth westward of the speaker or spectator; such as, occidental climates; occidental pearl; occidental gold.
2. When capitalized, Occidental, denotes or is characteristic of countries of Europe and the Western Hemisphere which is the opposite of Oriental or "eastern" countries.

The adjective and noun Oriental, with reference to people from East Asia, is now regarded as a relic of Western colonialism and should be avoided. The preferred term is Asian.

occidentalism
1. The quality or customs or mannerisms characteristic of Western civilizations.
2. The scholarly knowledge of Western cultures and languages and people.
recidivism
Stillicidi casus lapidem cavat.
Dripping moisture hollows out a stone.

Also translated as: "Slow and steady does it."

A cross reference of other word family units that are related directly, or indirectly, to: "chance, luck, fate": aleato-; auspic-; fortu-; -mancy; serendipity; sorc-; temer-; tycho-.