Verb or phraseRootFunctionReason
اِسْتَكْرَمْتُهُك ر مFindingFound nobility
اِسْتَوْطَنَ الْهِنْدَو ط نAdoptionChose homeland status
اِسْتَرْجَعَر ج عAbbreviationUttered a known formula
فَاسْتَقَامَق و مResponseResult of prior straightening
اِسْتَحْجَرَ الطِّينُح ج رTransformationClay's quality changed
Each form has a distinct semantic justification. Do not diagnose a function from the prefix alone; consider the clause and the textbook's explanation.