A sound analysis of an instrument noun considers root, active imperfect, derived pattern and instrument sense together.
Word / formMeaning / explanation
يَضْرِبُ ← مِضْرَبٌmifʿal.
مِضْرَبٌ ← مِضْرَبَةٌformal mifʿalah shape.
مِضْرَبٌ ← مِضْرَابٌformal mifʿāl shape.
These demonstrate three morphological templates. Not every theoretically generated form is necessarily common in actual Arabic; established lexical use and context remain relevant when choosing a word.