These are the source’s five examples of semantic equivalence.
Corresponding formForm-VIII exampleEquivalent verb
Form Iاِبْتَلَجَبَلَجَ
Form IVاِحْتَجَزَأَحْجَزَ
Form Vاِرْتَدَىتَرَدَّى
Form VIاِخْتَصَمَتَخَاصَمَ
Form Xاِئْتَجَرَاِسْتَأْجَرَ
Only semantic equivalence within these specified uses is claimed; the forms do not become morphologically interchangeable.