•rifle (one of the grooves inside the barrel of a firearm that improve its range and accuracy) · rifling (grooves in a gun barrel) · dress (system of furrows on the face of a millstone)
Borrowed from dialectal Swedish rifla (compare standard Swedish räffla, Danish riffel), from Low German riffel (compare archaic Dutch rijfelen), originally a frequentative derivation tracing back to Proto-Germanic *rīfaną.