dwindling is a form of:

Dwindle



verb
1.
(INTRANSITIVE) ~ (away) (to something) (to become gradually less or smaller, to become less, to shrink) រលោះបន្ដិចម្ដងៗ
2.
(TRANSITIVE) (to lessen) ធ្វើអោយរលោះបន្ដិចម្ដងៗ