The Austronesian Comparative Dictionary

Value -um-

Language:
Old Javanese
Parameter:
verbal infix used primarily in intransitive bases, including those that refer to natural conditions (e.g. 'lightning', 'flashing'; 'thunder', 'thundering, roaring') [3e997a2eb808b5e9b2d051053792355a]
References
Zoetmulder 1982