The word “kief” (sometimes spelled keef) is connected to the Arabic word kayf, which fittingly refers to pleasure or well-being. Given its higher THC content, this makes perfect sense. his powder is actually made up of tiny crystals that form the exterior of marijuana buds. It is surprisingly potent, and is therefore often used as a top sprinkling of sorts, dusted onto marijuana in bongs, blunts, joints, and bowls to amp up the THC content. You might be wondering why people don’t always use kief then. The fact is, kief can only be collected when you are using a grinder.