1. to be evolved, to be in a process of evolution (opp. vivaṭṭati in devolution) DN.i.17 DN.iii.84, DN.iii.109; AN.ii.142; DN-a.i.110.
2. to fall to pieces, to come to an end (like the world’s destruction), to pass away, perish, dissolve (intrs.) Ja.iii.75 (paṭhavī s.; variant reading saṃvaddh˚); Mil.287 (ākāso ˚eyya). For saṃvaṭṭ˚ at Ja.i.189 read saṃvaddh˚.

saṃ + vaṭṭati