In plain terms
Gharar
Pronunciation guide not yet available.

Source entry · Editorial review pending ↗
Gharar is excessive uncertainty or ambiguity in a contract — about its subject matter, price, or terms. Islamic law treats significant gharar as a concern in trade. A small, unavoidable degree of uncertainty is usually distinguished from gharar serious enough to affect a contract's validity.
Related terms
Riba
Riba is the term used in the Qur'an and hadith for an unjustified increase in a loan or in certain exchanges. It is commonly translated as interest or usury. Fatwas on banking…
Maysir
Maysir is gambling: a transaction where gain depends on chance, with one party's gain coming directly at another's loss. The Qur'an names it alongside khamr, intoxicants. Fatwas…