From Wiktionary, the free dictionary
From the infinitive of நிறை (niṟai, “to become full”).
நிறைய • (niṟaiya) (infinitive)
- to become full
நிறைய • (niṟaiya)
- a lot, abundantly, plentifully
- full of
- eg., ஒரு குவளை நிறைய தண்ணீர் ― oru kuvaḷai niṟaiya taṇṇīr ― "A cup full of water"
நிறைய • (niṟaiya)
- many