The natural constitution of the Pudgalas (physical substances) resulting from the Pariṇāma (1) (to undergo transformation from one state to another one) e.g., clouds.
jaṇṇaṃ abbhāṇaṃ, abbharukkhāṇaṃ jahā tatiyasae jāva amohāṇaṃ pariṇāmapaccaeṇaṃ baṃdhe samuppajjai.
(Bhaga 8.353)