-mancy, -mancer, -mantic, -mantical
(Greek: used as a suffix; divination, prophecy, fortune telling; to interpret signs so “practical” decisions can be made [related to -mania])
It isn't so much the things we don't know that gets us into trouble. It's the things we know that aren't so.
If you keep on saying things are going to be bad, you have a good chance of being a prophet.
Dating from the Middle Ages, many of these have survived as popular superstitions.
A belief that flowers radiate vibrations and have curative properties in healing disease. Many omens concerning the gathering of flowers at Midsummer’s Eve have survived to modern times; and the “good luck” commonly attributed to the finding of a four-leaf clover falls into this category.
2. The art of fortune-telling by using a clear, 'pot-bellied' glass bowl which was full of water and placed in front of candles: "This form of gastromancy preceded crystall-ball gazing as another type of telling fortunes."
3. Etymology: from Greek gastromanteia, "divination by the belly"; consisting of gaster, "pot-belly" + mant-eia, "power of divination" or "fortune telling"
The element, manteia, or -mancy, is related to Latin mens, mentis, "mind, soul, feelings".
Perhaps it was a carry-over from ancient oracles, where people inhaled natural gas from volcanic fissures and babbled incoherent utterances which gifted listeners interpreted as prophecies that determined the fate of nations.
2. A system of divination by scattering pebbles, dust, sand grains, or seed on the ground and interpreting their shapes and positions.
3. Making marks on the ground with a stick (now with a pencil or pen on paper).
Still used by modern-day Chinese in Hong Kong and other places before construction of a building takes place.

Originally, it was performed by people who moved around a circle marked with letters or symbols, until they became dizzy and stumbled, thus spelling out words or enabling a diviner to interpret the symbols. Some authorities say that it was from this concept that came the wild, whirling dances by fanatics who uttered prophecies after collapsing in a state of complete exhaustion.
Cross references of word families that are related directly, or indirectly, to: "divination, diviner; seer, soothsayer, prophecy, prophesy, prophet": augur-; auspic-; fa-, fate; Fates in action; futur-; omen; -phemia; sorc-, sorcery; vati-.
A cross reference of other word family units that are related directly, or indirectly, to: "chance, luck, fate": aleato-; auspic-; cad-; fortu-; serendipity; sorc; temer-; tycho-.