From Wiktionary, the free dictionary
Compound of വല്യ (valya) + അമ്മ (amma), literally “big mother”.
വല്യമ്മ • (valyamma)
- older maternal aunt
- grandmother
- Warrier, M. I. (2008) “വലിയമ്മ”, in Malayalam-English Dictionary (in Malayalam), 22nd edition, Kottayam: DC Books