Noun Derivation: Meaning Alone Is Not Enough

Advanced Sarf Application: Ambiguous Forms, Weak-Letter Reasoning and Error Correction

Identify derived nouns by both form and semantic function.

NounCategoryWhy
ضَارِبٌActive participleOne who strikes
مَضْرُوبٌPassive participleOne that is struck
أَكْبَرُComparativeGreater
مِفْتَاحٌInstrumentTool for opening
مَجْلِسٌPlace noun in contextPlace for sitting
حَسَنٌResembling adjectiveRelatively settled quality

Remember that lexicalized and figurative meanings can modify ordinary pattern expectations.